You have five books, and want to take three with you on vacation. How many different 3-book combinations could you take?

What is the sum of angles in a triangle?

What is the square root of 144?

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

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

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?

How would the number 70 (in base 10) be represented in base 3?