Mathematics Trivia

18

If the difference between two numbers is 6, and the difference of their squares is 180, what is the sum of the numbers?

12

A circle is placed inside a square so that all 4 corners touch the circle. What percentage of the circle is occupied by the square?

8

You begin writing down the letters of the alphabet in this pattern: You write A one time, B two times, C three times, D four times, and so on. What letter is 100th on the list?

20

A town in India has a population of 20,000 people. 5% of the inhabitants are one-legged, and half the others go barefoot. How many sandals are worn in this town?

4

This region was a kingdom of Czechoslovakia until the 15th century, when it passed to Hungary and then to the Hapsburgs. It became the core of the new state of Czechoslovakia in 1918. Today the name can refer to certain artistic intellectuals. Which regio

4

Can you think of two numbers for which the sum of their squares is 628 and the difference of their squares is 340?

1

The amount of chemicals in our drinking water is measured in milligrams per liter. The ratio of one milligram per liter is the same as the ratio of one dollar to ... how many?

4

If you go out to eat at a restaurant in a foreign country, and you must pay a 15% service fee, followed by a 12% tax on everything, even the service fee, what actual exact percentage did you pay above the base price?

14

To the nearest whole number, what is the area of a triangle each of whose sides is 10 inches?

20

39,370 inches is equivalent to what unit of distance?

11

If you pick one normal playing card from a deck at random, what's the probability that it will be a Jack, Queen, King, or heart? O.K. to leave answer in fractional form.

9

In a single-elimination sports tournament beginning with 64 teams, how many games are played altogether until only one team, the champion, remains?

2

The number 4, raised to what power, equals 8?

8

If you buy 100 shares of a stock at $30, 200 shares at $20, and 300 shares at $10, then sell all at $15, did you make a profit or loss? What percent?

6

A three digit number contains the digits 9, 5, and another digit. When this three digit number is reversed and subtracted from the original number, the result contains the same three digits as in the original number. What is the third digit?