Mathematics Trivia

5

What is the area, to nearest whole number, of an equilateral triangle whose perimeter is 300 meters?

3

The number 222, written in base three number system, would be equal to what number in base 10?

13

How many prime numbers are there between 50 and 70?

13

How many of the whole numbers from 1 to 100 are either divisible by 7 or include a 7 in their digits?

3

In order to estimate the population of fish in a lake, a biologist catches 75 fish, marks them, releases them. Next month she catches 75 fish and finds that 5 are tagged. Use this to estimate the fish population in the lake.

8

In a non-leap year, what month and date can be called the exact "middle day" of the year?

20

If you add the numerical value of all seven Roman numerals, what is the sum?

18

If the temperature is 100 degrees Fahrenheit, what is the temperature to the nearest degree, Centigrade?

21

a. What was the last year which read the same right side up as upside down? b. What will be the next year?

10

Three sisters have a total of $91. The first sister has 20% more than the second and the second sister has 20% more than the third. How much does the first sister have?

9

As you sit in your stopped car at a railroad crossing, a train travelling at 60 miles per hour takes twenty seconds to pass you. How many feet long is the train?

2

A high school senior said she knows all the seniors, half the juniors, 1/3 of the sophomores, and 1/4 of the freshmen. If each class has the same numbers of students, then she knows what fraction of the school?

9

Evaluate the given trigonometric expression: The sine of a 420 degree angle, in non-decimal form (exact answer)

18

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

2

This mysterious number, the base of a natural logarithm, is related to natural and exponential growth. What is this number called, and what is its decimal value?