- Wed Jun 25, 2025 1:54 pm#8735
31 | (6 × 9) + (6 + 9) = 69
Don't laugh. Just type that into your calculator and you'll see it's true.
32 | There Are 31 Days In Most Months
Out of the twelve months that make up a calendar year, the majority of these have 31 days: January, March, May, July, August, October, and December. Only four months—April, June, September, and November—have 30 days. And, of course, February typically only has 28 days, with the exception of leap years, when the month jumps up to 29 days—which happen every four years. The next leap year will be in 2020. You will know if a year is a leap year when the year's number is evenly divisible by four.
33 | In A Group Of 23 People, Two Will Probably Share a Birthday
In a sample of 23 people, there is a 50 percent chance that two will share the same birthday. This phenomenon is (fittingly) called the birthday problem. There is a whole calculation for why this is a thing, too. It all has to do with probability. For how, exactly, it works, direct yourself to this explainer, by mathematician Brett Berry, as she can do a far better job at explaining it than we ever could.
34 | We See Odd Numbers as Male, Even Numbers as Female
You wouldn't think numbers could have genders, but in our weird brains they do, apparently. Research published in the Journal of Experimental Psychology found that when an odd number was paired with a baby, subjects were much more likely to believe the baby was male, while they would assume the baby was female when paired with an even number.
It's an assumption with a long history, according to Live Science: "Our tendency to assign gender to numbers has a long history. Both the Pythagorean philosophy of ancient Greece and the Chinese philosophy of yin and yang viewed numbers as possessing gender. Both cultures also viewed odd numbers as masculine and even numbers as feminine."
35 | There's a Specific Name for 35th Anniversaries
It's called a "Coral Anniversary." Go somewhere with snorkeling!
36 | There Are More Ways to Arrange a Deck of Cards Than There Are Atoms on Earth
That probably seems crazy, but the fact is that if you shuffle a pack of cards, it's likely that exact order has never existed before in the history of the universe. Cassandra Lee at McGill University broke this down: "There are somewhere in the range of 8 x 1,067 ways to sort a deck of cards. That's an 8 followed by 67 zeros. To put that in perspective, even if someone could rearrange a deck of cards every second of the universe's total existence, the universe would end before they would get even one billionth of the way to finding a repeat."
37 | 7 Is Considered To Be A Lucky Number
Seven is the most significant number across religions and cultures. For example: there are seven colors in the rainbow, seven days in a week, seven notes on a musical scale, seven seas, and seven continents. Finally, seven often appeared throughout the world's favorite fictional works such as Snow White (seven dwarves) and, of course, James Bond (007).
38 | And The Number 13 Is Considered To Be Unlucky
You have probably heard that the number 13 is considered to be unlucky. Think Friday the 13th, for example. There are some other reasons that this number is so superstitious. One is that there were 13 people at the last supper. Oh, and there were traditionally 13 steps to the gallows; plus, a witches' coven generally had 13 members.
39 | 111,111,111 × 111,111,111 = 12,345,678,987,654,321
Though good luck finding a calculator that can factor equations in the millions.
40 | 40 Below Is the Only Temperature That Is the Same in Both Fahrenheit and Celsius
No conversion necessary. Minus 40 degrees, or "40 Below," is the only temperature that is the same in both Fahrenheit and Celsius. Other fun facts about the number 40: there are 40 standard spaces on a Monopoly board, the standard American work week is 40 hours, and 40 is the maximum number of players a MLB team can sign on its roster at one time. Oh, and a typical pregnancy lasts 40 weeks.
Don't laugh. Just type that into your calculator and you'll see it's true.
32 | There Are 31 Days In Most Months
Out of the twelve months that make up a calendar year, the majority of these have 31 days: January, March, May, July, August, October, and December. Only four months—April, June, September, and November—have 30 days. And, of course, February typically only has 28 days, with the exception of leap years, when the month jumps up to 29 days—which happen every four years. The next leap year will be in 2020. You will know if a year is a leap year when the year's number is evenly divisible by four.
33 | In A Group Of 23 People, Two Will Probably Share a Birthday
In a sample of 23 people, there is a 50 percent chance that two will share the same birthday. This phenomenon is (fittingly) called the birthday problem. There is a whole calculation for why this is a thing, too. It all has to do with probability. For how, exactly, it works, direct yourself to this explainer, by mathematician Brett Berry, as she can do a far better job at explaining it than we ever could.
34 | We See Odd Numbers as Male, Even Numbers as Female
You wouldn't think numbers could have genders, but in our weird brains they do, apparently. Research published in the Journal of Experimental Psychology found that when an odd number was paired with a baby, subjects were much more likely to believe the baby was male, while they would assume the baby was female when paired with an even number.
It's an assumption with a long history, according to Live Science: "Our tendency to assign gender to numbers has a long history. Both the Pythagorean philosophy of ancient Greece and the Chinese philosophy of yin and yang viewed numbers as possessing gender. Both cultures also viewed odd numbers as masculine and even numbers as feminine."
35 | There's a Specific Name for 35th Anniversaries
It's called a "Coral Anniversary." Go somewhere with snorkeling!
36 | There Are More Ways to Arrange a Deck of Cards Than There Are Atoms on Earth
That probably seems crazy, but the fact is that if you shuffle a pack of cards, it's likely that exact order has never existed before in the history of the universe. Cassandra Lee at McGill University broke this down: "There are somewhere in the range of 8 x 1,067 ways to sort a deck of cards. That's an 8 followed by 67 zeros. To put that in perspective, even if someone could rearrange a deck of cards every second of the universe's total existence, the universe would end before they would get even one billionth of the way to finding a repeat."
37 | 7 Is Considered To Be A Lucky Number
Seven is the most significant number across religions and cultures. For example: there are seven colors in the rainbow, seven days in a week, seven notes on a musical scale, seven seas, and seven continents. Finally, seven often appeared throughout the world's favorite fictional works such as Snow White (seven dwarves) and, of course, James Bond (007).
38 | And The Number 13 Is Considered To Be Unlucky
You have probably heard that the number 13 is considered to be unlucky. Think Friday the 13th, for example. There are some other reasons that this number is so superstitious. One is that there were 13 people at the last supper. Oh, and there were traditionally 13 steps to the gallows; plus, a witches' coven generally had 13 members.
39 | 111,111,111 × 111,111,111 = 12,345,678,987,654,321
Though good luck finding a calculator that can factor equations in the millions.
40 | 40 Below Is the Only Temperature That Is the Same in Both Fahrenheit and Celsius
No conversion necessary. Minus 40 degrees, or "40 Below," is the only temperature that is the same in both Fahrenheit and Celsius. Other fun facts about the number 40: there are 40 standard spaces on a Monopoly board, the standard American work week is 40 hours, and 40 is the maximum number of players a MLB team can sign on its roster at one time. Oh, and a typical pregnancy lasts 40 weeks.
