# Least Common Multiple (LCM), Fifth Grade Test

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This free test on www.math10.com is designed for students of fifth grade math. This test comprised of problems requiring calculation of least common multiple to two given numbers.
Question 1
The multiples of 12 are
12, 24, 36, 48, 60, 72,...
The multiples of 24 are
24, 48, 72, 96,...
In blue are the multiples that are common to 12 and 24.
What is the Least Common Multiple of 12 and 24?
LCM(12, 24) = ?

Question 2
The multiples of 5 are:
5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125,...
The multiples of 6 are:
6, 12, 18, 24, 30, 36, 42, 48, 54, 60, 66, 72, 78, 84, 90, 96, 102, 108, 114, 120,...
The multiples of 8 are:
8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 96, 104, 112, 120,...
What is the Least Common Multiple of 5, 6 and 8?
LCM(5, 6, 8) = ?

Question 3
The image shows the decomposition of 5, 6, 4 in their prime factors.
$LCM(5,6,4)=$ Question 4
What is the LCM of 4 and 11?
Question 5
What is the LCM of 4 and 6?
Question 6
What is the LCM of 2 and 8?
Question 7
What is the LCM of 12 and 9?
Question 8
What is the LCM of 6 and 9?
Question 9
What is the LCM of 8 and 14?
Question 10
What is the LCM of 1 and 11?
Question 11
Which of the following fractions $\frac{5}{6}, \frac{13}{18}, \frac{1}{3}$ and $\frac{8}{9}$ is the biggest?

Question 12
Which of the following statements is true?
The Least Common Multiple of two numbers that the second one is divisible by first is:

Question 13
The Least Common Multiple of two prime numbers p and q is
LCM$(p, q) =p\cdot q$

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