If 9 : 13 :: 20 : x, find x.

The difference between 6/9 and 5/8 in lowest terms is:

The complement of 24° plus the supplement of 104° equals:

A 2-digit number has tens digit 9 and ones digit 1. What is the sum of its digits?

A remaining distance of 150 km is to be covered at 42 km/h. How many minutes will this take?

A jeep covers 200 km at 48 km/h and then 220 km at 72 km/h. What is the average speed for the whole journey?

A cadet cycles 300 km at 65 km/h. How many hours does the journey take?

Which is the greatest: 0.74, 0.70, 7/10, 0.7?

Find the product: 14.2 × 3.85.

How many diagonals does a 10-sided polygon have?

How many factors does 72 have?