On a test consisting of 80 questions, Nasir answered 75% of the first 60 questions correctly. What percent of the other 20 questions does he need to answer correctly for his grade on entire examination to be 80%?

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...

A researcher computed the mean, the median and the standard deviation for a set of performance scores. If 5 we...

If the angles of a five-sided polygon are in the ratio of 2:3:3:5:5, what is the measure of the smallest angle...

A person has 14 red socks and 14 white socks in a drawer. What is the minimum number of socks that he should t...