Common Factor

A number is a common factor of two numbers if both numbers are divisible by it. A number is divisible by another number when it can be divided evenly. For instance, a number is divisible by 2 if it is even. Divisible by 5 if it is ending in 0 or 5. Divisible by 10 if it is ending in 0.

Answer:

1. 2

2. 5

3. 2, 5, and 10

4. 2

5. 2

Solutions:

1. 484 and 136

484 ÷ 2 = 242

136 ÷ 2 = 68

2. 140 and 345

140 ÷ 5 = 28

345 ÷ 5 = 69

3. 560 and 230

560 ÷ 2 = 280 560 ÷ 5 = 112 560 ÷ 10 = 56

230 ÷ 2 = 115 230 ÷ 5 = 46 230 ÷ 10 = 23

5. 948 and 750

948 ÷ 2 = 474

750 ÷ 2 = 375

Things to Remember:

.Number is divisible by 2, if the digit is a 2, 4, 6, 8 or 0, the number is divisible by 2.

.Number is divisible by 5, if the digit is a 5 or a 0, the number is divisible by 5.

.Number is divisible by 10, if the digit is a 0, the number is divisible by 10.