Essentials of Algebra

Front

What is the rule for determining if a number is divisible by 3?

Back

A number is divisible by 3 if the sum of its digits is divisible by 3.

Front

Solve for x: 14 + x = 21.

Back

x = 7

Front

Back

Front

What is the formula for the area of a rectangle?

Back

Area = length × width.

Front

What is the divisibility rule for 5?

Back

The last digit needs to be a 5 or 0.

Front

Back

x = 4.

Front

What is the greatest common factor (GCF) of 12 and 16?

Back

The GCF is 4.

Front

What is the least common multiple (LCM) of 3 and 5?

Back

The LCM is 15.

Front

What is the formula for the perimeter of a rectangle?

Back

Perimeter = 2(length + width).

Front

Back

x = 3.