G.C.F, L.C.M, and Divisibility worksheet for grade 6

G.C.F, L.C.M, and Divisibility

Name:

Date:

1. Choose the correct answer:

• a. The G.C.F of $6$ and $5$ is
  A. 1 B. 11 C. 30 D. 60
• b. The number $\mathrm{7,904}$ is divisible by
  A. 3 B. 4 C. 5 D. 6
• c. Which of the following are relatively prime numbers?
  A. 4 and 6 B. 8 and 15 C. 8 and 18 D. 8 and 24
• d. In the opposite Venn diagram: the L.C.M is
  
  A. 0 B. 1 C. 15 D. 8
• e. The number which its all prime factors are $2,3$ and $7$ is
  A. 12 B. 42 C. 23 D. 13
• f. The G.C.F of two relatively prime numbers is
  A. 0 B. 1 C. 2 D. 3

2. Complete the following.

• a. The number is divisible by $5$ if its Ones digit is or .
• b. The L.C.M of $6$ and $9$ is .
• c. is the G.C.F for any two prime numbers.
• d. In the opposite Venn diagram: the G.C.F is .
  
• e. The greatest 3-digit number divisible by $2$ is .

3. Use Venn diagram to find G.C.F and L.C.M of 12 and 15.

4. A school took 148 students to participate in the trip.

• Can we distribute the students on 4 buses? and why?

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