Sam Kumar Sachdev
@samsachdev.bsky.social
Founder of Ziporama. I like math and Alf.
Ziporama: https://www.ziporama.com/
Alf: https://en.wikipedia.org/wiki/ALF_(TV_series)
Ziporama: https://www.ziporama.com/
Alf: https://en.wikipedia.org/wiki/ALF_(TV_series)
Democrats Just Had Their Best Night in YEARS
YouTube video by The Bulwark
www.youtube.com
November 5, 2025 at 6:14 PM
A quick logic puzzle:
If you're running a (foot) race and are in 3rd position, you then pass the runner in the 2nd position. Which position are you now in?
If you're running a (foot) race and are in 3rd position, you then pass the runner in the 2nd position. Which position are you now in?
October 28, 2025 at 2:11 PM
A quick logic puzzle:
If you're running a (foot) race and are in 3rd position, you then pass the runner in the 2nd position. Which position are you now in?
If you're running a (foot) race and are in 3rd position, you then pass the runner in the 2nd position. Which position are you now in?
1/ I just discovered this -- and can't believe I just did. There is no solution to the following: find the integral from infinity to minus infinity of e^((-z^2)/2)dz, where z is any real number.
Specifically, it's been proven that there's no solution to this indefinite integral.
Specifically, it's been proven that there's no solution to this indefinite integral.
October 26, 2025 at 2:27 AM
1/ I just discovered this -- and can't believe I just did. There is no solution to the following: find the integral from infinity to minus infinity of e^((-z^2)/2)dz, where z is any real number.
Specifically, it's been proven that there's no solution to this indefinite integral.
Specifically, it's been proven that there's no solution to this indefinite integral.
An insightful, intelligent talk from an historian of 20th century German history on the parallels between Trump, the GOP and Hitler's regime. More broadly, the talk is about when history can be interpreted literally and when it can't:
www.youtube.com/watch?v=x7FY...
www.youtube.com/watch?v=x7FY...
Margaret MacMillan Lecture featuring Prof. Benjamin Carter Hett
YouTube video by Trinity College in the University of Toronto
www.youtube.com
October 24, 2025 at 2:08 PM
An insightful, intelligent talk from an historian of 20th century German history on the parallels between Trump, the GOP and Hitler's regime. More broadly, the talk is about when history can be interpreted literally and when it can't:
www.youtube.com/watch?v=x7FY...
www.youtube.com/watch?v=x7FY...
1/Nexperia is a 100% Chinese-owned company based in the Netherlands. It makes semiconductors primarily for cars. Last week, the Dutch gov't nationalized it. That is, they formally took over ownership of the company. Why? It seems to be because of US pressure.
This has the potential to blowup.
This has the potential to blowup.
October 19, 2025 at 3:20 PM
1/Nexperia is a 100% Chinese-owned company based in the Netherlands. It makes semiconductors primarily for cars. Last week, the Dutch gov't nationalized it. That is, they formally took over ownership of the company. Why? It seems to be because of US pressure.
This has the potential to blowup.
This has the potential to blowup.
Reposted by Sam Kumar Sachdev
📽️ WATCH: Epidemiologist Erin McCanlies spent much of the past 20 years studying how parents’ exposure to toxic chemicals affects the chances that they will have an autistic child.
RFK Jr. cut her entire division — yet promises to identify the causes of autism by September: https://propub.li/4nhXQua
RFK Jr. cut her entire division — yet promises to identify the causes of autism by September: https://propub.li/4nhXQua
September 21, 2025 at 9:01 PM
📽️ WATCH: Epidemiologist Erin McCanlies spent much of the past 20 years studying how parents’ exposure to toxic chemicals affects the chances that they will have an autistic child.
RFK Jr. cut her entire division — yet promises to identify the causes of autism by September: https://propub.li/4nhXQua
RFK Jr. cut her entire division — yet promises to identify the causes of autism by September: https://propub.li/4nhXQua
According to the latest AP poll, there's been a significant drop in Republicans who say the country is on the wrong track. In June 70% thought the country was on the right track. This month, September, it fell to 50%. Also noteworthy, this didn't change Trump's approval rating:
More Republicans say US is headed in the wrong direction, poll finds
YouTube video by Associated Press
www.youtube.com
September 20, 2025 at 7:35 PM
According to the latest AP poll, there's been a significant drop in Republicans who say the country is on the wrong track. In June 70% thought the country was on the right track. This month, September, it fell to 50%. Also noteworthy, this didn't change Trump's approval rating:
This is posted on a San Francisco billboard: https: // {64659, 123310, 75584, 8138, 38271}
These are tokenizers (token id's). So, a brute force approach is needed to map the text to the lexical token.
Didn't know these were token id's. Googled it. After that, it was straight forward. Disappointed.
These are tokenizers (token id's). So, a brute force approach is needed to map the text to the lexical token.
Didn't know these were token id's. Googled it. After that, it was straight forward. Disappointed.
September 20, 2025 at 3:29 PM
This is posted on a San Francisco billboard: https: // {64659, 123310, 75584, 8138, 38271}
These are tokenizers (token id's). So, a brute force approach is needed to map the text to the lexical token.
Didn't know these were token id's. Googled it. After that, it was straight forward. Disappointed.
These are tokenizers (token id's). So, a brute force approach is needed to map the text to the lexical token.
Didn't know these were token id's. Googled it. After that, it was straight forward. Disappointed.
1/According to this average of presidential approval ratings, Trump is -7.5%. Here, however, is approval rating for:
Immigration: -3.4%
Economy: -14.1%
Trade: -18.9%
Inflation: -30.4%
This averages to -16.7%. Obviously, a weighted average can be used to get -7.5%. The question is...
Immigration: -3.4%
Economy: -14.1%
Trade: -18.9%
Inflation: -30.4%
This averages to -16.7%. Obviously, a weighted average can be used to get -7.5%. The question is...
September 19, 2025 at 11:32 PM
1/According to this average of presidential approval ratings, Trump is -7.5%. Here, however, is approval rating for:
Immigration: -3.4%
Economy: -14.1%
Trade: -18.9%
Inflation: -30.4%
This averages to -16.7%. Obviously, a weighted average can be used to get -7.5%. The question is...
Immigration: -3.4%
Economy: -14.1%
Trade: -18.9%
Inflation: -30.4%
This averages to -16.7%. Obviously, a weighted average can be used to get -7.5%. The question is...
The (political) joke of the year (so far): “RFK Jr has less brains than his uncle”:
m.youtube.com/watch?v=p3db...
m.youtube.com/watch?v=p3db...
Pro-Vaccine Messengers Need to Pick a Lane | Gianmarco Soresi | Stand Up Comedy
YouTube video by Gianmarco Soresi
m.youtube.com
September 17, 2025 at 1:02 PM
The (political) joke of the year (so far): “RFK Jr has less brains than his uncle”:
m.youtube.com/watch?v=p3db...
m.youtube.com/watch?v=p3db...
If you sum the amount of steel the top 8 steel producing countries produce annually and multiply this by two, you get the amount of steel that China produces annually:
www.visualcapitalist.com/who-makes-th...
www.visualcapitalist.com/who-makes-th...
Who Makes the World’s Steel? Top 10 Countries, Ranked
One country makes over half of the world’s steel. See how other nations stack up in our ranking of the top ten steel producers by output.
www.visualcapitalist.com
September 17, 2025 at 2:47 AM
If you sum the amount of steel the top 8 steel producing countries produce annually and multiply this by two, you get the amount of steel that China produces annually:
www.visualcapitalist.com/who-makes-th...
www.visualcapitalist.com/who-makes-th...
Scott Bessant has founded two hedge funds. Both failed. In 2000, he founded Bessant Capital, which closed in 2005. In 2017, he founded Key Square. By '24, it had lost 90% of its value and was closed:
www.anbound.com/Section/Arti...
www.anbound.com/Section/Arti...
Scott Bessent: An Ambitious but Unfit Treasury Secretary
The conflict between Elon Musk and Scott Bessent has become
public, and their shouting match in the White House corrido...
www.anbound.com
September 9, 2025 at 2:25 PM
Scott Bessant has founded two hedge funds. Both failed. In 2000, he founded Bessant Capital, which closed in 2005. In 2017, he founded Key Square. By '24, it had lost 90% of its value and was closed:
www.anbound.com/Section/Arti...
www.anbound.com/Section/Arti...
The two movie suggestions that Hulu repeatedly keeps suggesting to me: "Gandhi" and "The 40-Year-Old Virgin".
September 6, 2025 at 3:10 AM
The two movie suggestions that Hulu repeatedly keeps suggesting to me: "Gandhi" and "The 40-Year-Old Virgin".
This Startup Is Racing To Be The First To Mine Helium On The Moon
YouTube video by Forbes
m.youtube.com
September 6, 2025 at 12:29 AM
According to the World Travel and Tourism Council, there's only one country, among the 184 it looks at the data of, where tourism is projected to decline this year. And that's the US. It's projected to decline 8%. Prior to the start of this year, it was projected to rise 9%:
The ‘self-inflicted injury’ to US tourism that’s making some Americans angry and disappointed | CNN
Many international travelers are skipping the US this year. ““I am super-duper angry. I’m also disappointed,” said one business owner who’s feeling the effects of tourists staying away.
edition.cnn.com
September 2, 2025 at 4:19 PM
According to the World Travel and Tourism Council, there's only one country, among the 184 it looks at the data of, where tourism is projected to decline this year. And that's the US. It's projected to decline 8%. Prior to the start of this year, it was projected to rise 9%:
1/Is 561 prime? I used Fermat’s little theorem, where a=100. So: 100^560 = mod 561 = 1. So, 561 is prime. The problem, 561 is composite. This has resulted in a lot of reading of why certain values of “a” — the base — work and which don’t.
September 1, 2025 at 7:19 PM
1/Is 561 prime? I used Fermat’s little theorem, where a=100. So: 100^560 = mod 561 = 1. So, 561 is prime. The problem, 561 is composite. This has resulted in a lot of reading of why certain values of “a” — the base — work and which don’t.
This is an amazing story and would make a great movie. Tommy Carmichael invented a series of gadgets to steal from slot machines. Over 20 years, he stole about $45 million using these gadgets:
m.youtube.com/watch?v=XvCM...
m.youtube.com/watch?v=XvCM...
How This Device illegally Won $44.9 Million From Las Vegas
YouTube video by Vince Vintage
m.youtube.com
August 29, 2025 at 2:36 AM
This is an amazing story and would make a great movie. Tommy Carmichael invented a series of gadgets to steal from slot machines. Over 20 years, he stole about $45 million using these gadgets:
m.youtube.com/watch?v=XvCM...
m.youtube.com/watch?v=XvCM...
I found this statistic remarkable. If you were married (in the US), more than 50 years ago, you have a 49.8% chance of still being married (to the same spouse):
familyinequality.wordpress.com/2016/02/13/h...
familyinequality.wordpress.com/2016/02/13/h...
Has your marriage lasted 50 years? Congratulations, you’re old
It’s all in the denominator. Happy Valentine’s Day!
familyinequality.wordpress.com
August 28, 2025 at 2:43 PM
I found this statistic remarkable. If you were married (in the US), more than 50 years ago, you have a 49.8% chance of still being married (to the same spouse):
familyinequality.wordpress.com/2016/02/13/h...
familyinequality.wordpress.com/2016/02/13/h...
1/China has bought ZERO soybeans from American farmers this year, although the price of soybeans is slightly less this year. In contrast, China is buying heavily from Brazil. If China buys at the same level they did last year, for the remaining months of the year…
August 28, 2025 at 1:19 PM
1/China has bought ZERO soybeans from American farmers this year, although the price of soybeans is slightly less this year. In contrast, China is buying heavily from Brazil. If China buys at the same level they did last year, for the remaining months of the year…
According to the Maddison Project, a database that tracks economic history at the University of Groningen in the Netherlands, Europe’s proportion of the global economy is now likely the lowest since the Middle Ages:
www.msn.com/en-us/politi...
www.msn.com/en-us/politi...
MSN
www.msn.com
August 22, 2025 at 10:56 PM
According to the Maddison Project, a database that tracks economic history at the University of Groningen in the Netherlands, Europe’s proportion of the global economy is now likely the lowest since the Middle Ages:
www.msn.com/en-us/politi...
www.msn.com/en-us/politi...
1/The methodology of averaging polls, as demonstrated on this link, I find strange. Why? There are two sets of polls: one that move with news events and economic conditions and one that doesn't. So, I find it strange that these two should be averaged together. Specifically, the averaging process...
August 22, 2025 at 7:03 PM
1/The methodology of averaging polls, as demonstrated on this link, I find strange. Why? There are two sets of polls: one that move with news events and economic conditions and one that doesn't. So, I find it strange that these two should be averaged together. Specifically, the averaging process...
Reposted by Sam Kumar Sachdev
Of 25 countries surveyed, majorities in all but three – Israel, Nigeria and the U.S. – see global climate change as a major threat. www.pewresearch.org/...
August 22, 2025 at 6:00 PM
Of 25 countries surveyed, majorities in all but three – Israel, Nigeria and the U.S. – see global climate change as a major threat. www.pewresearch.org/...
Reposted by Sam Kumar Sachdev
Yarukinashio is an unmotivated rice cake guy who appears in stickers on the Line app.
August 11, 2025 at 2:29 PM
Yarukinashio is an unmotivated rice cake guy who appears in stickers on the Line app.
As of 2024, the largest prime that has been factored using Shor's algorithm on a quantum computer is 21:
www.youtube.com/watch?v=O4jv...
www.youtube.com/watch?v=O4jv...
V1a: Post-quantum cryptography (Kyber and Dilithium short course)
YouTube video by Cryptography 101
www.youtube.com
August 21, 2025 at 1:47 PM
As of 2024, the largest prime that has been factored using Shor's algorithm on a quantum computer is 21:
www.youtube.com/watch?v=O4jv...
www.youtube.com/watch?v=O4jv...
For all Americans:
* 21% are illiterate
* The average reading level is at the 8th grade level
* 54% read below the 6th grade level
* 20% read below the 5th grade level
(All data is from 2024)
www.thenationalliteracyinstitute.com/2024-2025-li....
* 21% are illiterate
* The average reading level is at the 8th grade level
* 54% read below the 6th grade level
* 20% read below the 5th grade level
(All data is from 2024)
www.thenationalliteracyinstitute.com/2024-2025-li....
2024-2025 Literacy Statistics | National Literacy
Literacy Statisitics
www.thenationalliteracyinstitute.com
August 21, 2025 at 12:03 AM
For all Americans:
* 21% are illiterate
* The average reading level is at the 8th grade level
* 54% read below the 6th grade level
* 20% read below the 5th grade level
(All data is from 2024)
www.thenationalliteracyinstitute.com/2024-2025-li....
* 21% are illiterate
* The average reading level is at the 8th grade level
* 54% read below the 6th grade level
* 20% read below the 5th grade level
(All data is from 2024)
www.thenationalliteracyinstitute.com/2024-2025-li....