Pre-Algebra Number Theory Test

What is the greatest common divisor of 12 and 20?

• 3

• 12

• 5

• 4

Factor 2x + 6y

• 2(x + 3y)

• 2 + 6 (x + y)

• 2x(3y)

• D 6(2x + y)

Simplify 7(m + 4n).

• 7m + 4n

• (7m +4) n

• 7(m +28n)

• 7m + 28n

Find the least common multiple of (18, 54).

• 972

• 54

• 18

• 1

Find the least common multiple of the numbers (5, 7, 35)

• 7

• 1225

• 70

• 35

2|18 (divisible)

• True

• False

. 9|90

• True

• False

10|475

• True

• False

6|105

• True

• False

. 4|218

• True

• False