At 3 A.M. the temperature was 13 degree below zero. By noon, it had risen to 32. What was the average hourly increase in temperature?

In January, the value of a stock increased by 25%, and in February, it decreased by 20%.How did the value of t...

The population of a country doubled every 10 years from 1960 to 1990. What was the percent increase in populat...

On a test consisting of 80 questions, Nasir answered 75% of the first 60 questions correctly. What percent of...

A hospital has enough pills on hand to treat 10 patients 14 days. How long will the pills last if their are 35...

Avi drove from his home to college at 60 miles per hour. Returning over the same route, there was a lot of tra...

Let A be the set of primes less than 6,and B be the set of positive odd numbers less than 6. How many differen...