Monday, June 30, 2014


I was in a line to buy cronuts this morning.  There were 120 people in line when the bakery opened at 8 am.  (I was 10th on line, having shown up at 6:09.)

Sunday, June 29, 2014


The diameter of a circle is equal to the diameter of a circle times pi.  It is also equal to the radius of a circle times tau.  Tau is twice pi, approximately 6.2831853071.  Many people (myself included) feel that we should use tau instead of pi.  It would make measuring angles in radians more intuitive.

Pi day is celebrated on March fourteenth, 3-14.  Tau day is celebrated on June twenty-eighth, 6-28.  Yesterday was Tau day.

A group of 8 of us went out for pizza for dinner last night for no reason other than I wanted to try this place.  We ordered a couple of pizzas.  My brother was wearing a math shirt, so a man from the next table came over to us, and we talked about math a bit.

A bit later he came over to us and commented "I see you're celebrating Tau Day with two pies."

Saturday, June 28, 2014


Expert, whoever they are, estimate that in the past 3500 years, the time without a war anywhere on earth totals about 230 years.

Friday, June 27, 2014


Some nature preserve project had us count horseshoe crabs along the beach.  We counted 22:  2 females and 20 males.

This is 2 of the crabs, mating.  The female is the larger one.   The black things around the edge of the picture are our boots.

Thursday, June 26, 2014

Wednesday, June 25, 2014


In 2013 there were 653 track fires caused by trash in the NYC subway system.  (source:  An announcement in the subway system asking us not to litter.)

Tuesday, June 24, 2014


On Amazon, an ounce of "Indian Kashmir Saffron" sells for $13.50 / gram.  This comes to $6,123.50 per pound.

Monday, June 23, 2014


Here is an app for only $999.99


QSFFStats lets you keep track of Flag Football stats for all passing leagues and is made specially for the company's website.

Sunday, June 22, 2014


1904 was the year that the NYC subway opened, and the year that Stuyvesant HS opened.

Saturday, June 21, 2014


On "Married with Children", Peg's cousin dropped off their son, 7, for the Bundys to raise.  Peg adored him.  The reviewers didn't and he disappeared without any reason given.

Friday, June 20, 2014


An echidna's penis has 4 heads. When a male echidna has sex with a female echidna, one side of the penis seems to shut down, leaving only two out of the four heads in use. The next time he mates, the heads on the other side will be used.

Thursday, June 19, 2014

4114 = 2012 + 2102

2012 squared is 4048144

and you can reverse both numbers and it still works.

2102 squared is 4418404


Wednesday, June 18, 2014


     Girls in miniskirts and high heels; rabbis in black hats and white Shirts; the revelry of the Gay Pride parade in the background - this is Friday night in Tel Aviv and a Shabbat for the record books.
     Exactly 2,226 people gathered at Hangar 11 at the Tel Aviv Port to participate in the record making largest Shabbat meal ever, organized by White City Shabbat, the Tel Aviv-based NGO that organizes public shabbat meals once a month at the Goren Synagogue on Modigliani Street, as well as other events geared toward the English-speaking and olim community that include holiday learning classes, chalah baking classes, and religious lectures. Sponsors of the Guinness event include the Tel Aviv Municipality.
     White City Shabbat is as popular for its monthly Shabbats as Tel Aviv is notorious for secularism.  “One of the reasons we started White City Shabbat is because Shabbat doesn’t need to be in the domain of the religious,” co-founder Deborah Danan said at the start of the event. “For those that don’t have family here, White City has become an alternate family.”
     For the Guinness world record event, it took three months of preparation, 60 days of crowdsource fundraising and the culmination is 600 bottles of wine from sponsor Golan Heights Winery, 74 bottles of vodka, 1,800 pieces of chicken,  1,000 pieces of meat, 250 vegetarian options, and 2,000 people signed up, with hundreds more having signed up for a waitlist. Notable attendees are Alan Dershowitz, Tel Aviv Mayor Ron Huldai, Tel Aviv Chief Rabbi Meir Lau, and former ambassador to the US Michael Oren.

Tuesday, June 17, 2014


Think your last Starbucks order was expensive? Think again.
On Saturday, a customer the blog Consumerist identified only as “Andrew” allegedly ordered a massive, 60-espresso-shot 128-ounce milkshake, which would have cost an astounding $54.75. (That’s one way to get brain freeze.)
Luckily for Andrew, he’s a “Gold” member of Starbucks’ loyalty program, which snags him one free drink for every dozen he buys. Unfortunately for Starbucks, the chain didn’t stipulate how large or expensive the drink can be. And Andrew, inspired by a 2013 YouTube video featuring the previous record holder for most-expensive-Starbucks-order, took advantage; this behemoth was his “gimme.”
According to an email Andrew sent Consumerist, the extras in his milkshake included two bananas, strawberries, matcha green tea powder, pumpkin spice… and those whopping 60 shots of espresso.
"I gotta say, it was delicious," Andrew wrote, adding that he finished off an impressive third of it. No word on whether Andrew was able to sleep that night.

Monday, June 16, 2014


3 Jewish teenagers have been kidnapped by Hamas.  We don't know much more.

Sunday, June 15, 2014


Former First Lady Hillary Clinton recently revealed that she and her husband were “dead broke” when they left the White House. Her claim — which was significantly undercut by the fact that she received an $8 million signing bonus for her memoir at around the same time — has been mocked relentlessly.
However, Campus Reform’s Caleb Bonham has created the “Hillary Clinton Fund for Dead Broke Politicians” in a valiant effort to make sure future U.S. presidents and their families are not destitute when they leave the White House.
Bonham recently visited Georgetown University to ask students to donate to the “Hillary Clinton Fund for Broke Politicians,” though he predictably failed to find people who really sympathize with the former first lady.
Bonham received a total of $5.63 in donations and he plans to send the money directly to Hillary Clinton.

Friday, June 13, 2014


The sum of the proper factors of 945 is 975.  Any number whose proper factors add up to more than  the number itself is an abundant number.  945 is the lowest odd abundant number.  I don't know how many even abundant numbers there are below 945, but there are over 100.

Thursday, June 12, 2014


Twin boys delivered 24 days apart

Twin boys delivered 24 days apart at Tufts Medical Center in Boston are doing well, the Boston Globe reported.

Lindalva DaSilva, 35, was only 24 weeks pregnant with her twins when she went into labor on February 27. Though doctors attempted to halt her contractions, they were unsuccessful.  As DaSilva went into labor, Dr. Sabrina Craigo, chief of Maternal-Fetal Medicine at Tufts, informed her of the possibility of delivering one twin, and keeping the other inside the womb, if conditions during the delivery were right.

After delivering son Alexandre, DaSilva’s labor slowed. She was treated with antibiotics and moved back to her hospital room to wait, while baby Alexandre fought for his life in the intensive care unit.

Twenty-four days later, Alexandre’s twin brother Ronaldo was born.  Both twins are still being treated in intensive care, but doctors say their prognosis is good – and they should be able to return home by their original due date, June 18.

Delayed deliveries, which are extremely rare, can carry a risk of infection. They can only be performed on fraternal twins, who don’t share a placenta, and are only feasible if the mother’s contractions slow after the first baby is born, the Boston Globe reported.  Craigo told the Boston Globe she’s delivered fewer than 10 delayed twin births in the last two decades – and never with as much time between deliveries accompanied by positive outcomes for both infants.

Wednesday, June 11, 2014


This North Sacramento, Calif., ZIP code is among the most diverse in the country, Business Insider last year. Race and ethnic groups are more evenly distributed here than in most places, meaning residents are more likely to encounter people who are different. The population broke down along these lines: Asian, 20.4 percent; black, 15.8 percent; Hispanic, 27.4 percent; white, 29.2 percent; and multiracial, 5.2 percent.

Tuesday, June 10, 2014


Some facts about the number 170:

170 = 2 x 5 x 17.

170 is 10101010 in base 2 (binary). It is 2222 in base 4.

170 has two representations as a sum of two squares: 170 = 12 + 132 = 72 + 112.

170 is the smallest number that can be written as the sum of the squares of two distinct primes, where each of these primes is the square of a prime added to another prime: 170 = (22 + 3)2 + (32 + 2)2.

170 is the start of a record-breaking run of consecutive integers (170 to176) with an odd number of prime factors.

Each internal angle of a regular 36-sided polygon is 170 degrees.

(copied from NumberADay who copied it from Prime Curios!)

Monday, June 9, 2014


a few facts about 49:

449 is a prime number.

449 is the smallest prime number whose digits are composite perfect squares.

449 is the 87th prime. Note that 42 + 42 + 92 = 82 + 72 = 113.

449 is the sum of five consecutive prime numbers: 449 = 79 + 83 + 89 + 97 + 101.

(copied from Mathematical Association of America who copied it from Prime Curios)

Sunday, June 8, 2014


In the King James Bible Psalm 46, the 46th word is "shake". The 46th word from the end is "spear". Shakespeare was 46 in 1610 when the text was being prepared for printing.

Saturday, June 7, 2014

101 ( 25 + 76 )

There are 2 2-digit numbers that are automorphic.  When you raise the number to any power, the number you get ends with the original number.

Friday, June 6, 2014

Chapernowne's number, 0.12345678910111213141516171819202122232425...

Chapernowne's number, 0.12345678910111213141516171819202122232425... This is constructed by concatenating the digits of the positive integers. (Can you see the pattern?)

This number is irrational (it can not be written as a fraction) and transcendental (it can not be the solution to an algebraic equation).

Thursday, June 5, 2014


The fastest known moon in our solar system, Metis, travels at 70400 mph, circling Jupiter every 7 hours, 4 minutes, and 29 seconds. 

for more info:  Metis on Wikipedia

Wednesday, June 4, 2014


There are several theories as to why the number 13 is considered unlucky:

13 turns make a traditional hangman's noose. Anything less would not snap a neck.  (I don't know if that is true or not.  I have not tried it.)

At Jesus's last supper, there were thirteen people around the table, counting Jesus and the twelve apostles.

On Friday 13 October 1307, King Philip IV of France ordered the arrest of the Knights Templar.

A year which contained 13 full moons instead of 12 posed problems for the monks who were in charge of the calendars. This upset the regular arrangement of church festivals.

In ancient cultures, the number 13 represented femininity, because it corresponded to the number of menstrual cycles in a year (13 x 28 = 364 days). The theory is that, as the solar calendar triumphed over the lunar, the number thirteen became anathema.

Ancient Persians believed the twelve constellations in the Zodiac controlled the months of the year, and each ruled the earth for a thousand years at the end of which the sky and earth collapsed in chaos. Therefore, the number is identified with chaos and the reason Persians leave their houses to avoid bad luck on the thirteenth day of the Persian Calendar, a tradition called Sizdah Bedar.

In the Viking tradition, it is believed that Loki in the Norse pantheon was the 13th god—more specifically, Loki was believed to have engineered the murder of Balder, and was the 13th guest to arrive at the funeral.

Tuesday, June 3, 2014


9 x 9 + 7 = 88

98 x 9 + 6 = 888

987 x 9 + 5 = 8888

9876 x 9 + 4 = 88888

98765 x 9 + 3 = 888888

987654 x 9 + 2 = 8888888

9876543 x 9 + 1 = 88888888

98765432 x 9 + 0 = 888888888

(listed under 9 because that is the constant in the multiplication)

Monday, June 2, 2014


The Original “HOLLYWOOD” Sign sold on ebay for $450,400.

“I hope the winning bidder has exciting plans for it,” said the sign’s previous owner, Dan Bliss. Built in 1923 as a real-estate gimmick, the maiden set of oversized “Hollywood” letters overlooked Los Angeles until it was replaced by a newer group in 1978. The former landmark finally found a new home after being auctioned off in 2005.



Sunday, June 1, 2014


On this day (in the Jewish calendar - 2nd of Sivan) in 1967, the 6 Day War ended.