Arrange the numbers in a 4×4 grid under a certain condition.

How old are the twins and their younger brother?

Find numbers whose prime factors equal a certain sum.

How much money did Judy give Dave?

Find the counterfeit coin.

Determine the number of zeros at the end of a particular factorial.

How could you cook eggs for 15 minutes if you do not have a 15-minute timer?

Is today’s date a factor of this month?

Which numbers are divisible by all three of the smallest prime numbers?

How many pages did Alexis read?