Mathematics
LCM & GCD
Grade 5 · Elementary
Answer every question first, then press Finish to see your score and explanations.
- Question 1 of 20Easy
The prime factorization of 24 is ...
- Question 2 of 20Easy
The factors of 18 are ...
- Question 3 of 20Medium
The LCM of 12 and 18 is ...
- Question 4 of 20Medium
The GCD of 24 and 36 is ...
- Question 5 of 20Hard
Bus A leaves the terminal every 12 minutes and bus B every 18 minutes. If they leave together at 07.00, they will leave together again at ...
- Question 6 of 20Easy
The GCD of 8 and 12 is ...
- Question 7 of 20Easy
The LCM of 4 and 6 is ...
- Question 8 of 20Easy
The prime factors of 30 are ...
- Question 9 of 20Easy
The LCM of 6 and 9 is ...
- Question 10 of 20Medium
The GCD of 36 and 48 is ...
- Question 11 of 20Medium
The LCM of 15 and 20 is ...
- Question 12 of 20Medium
Mother has 24 cakes and 36 candies to put into several bags with equal contents. The greatest number of bags she can make is ...
- Question 13 of 20Medium
Two lamps blink every 8 seconds and 12 seconds. If they blink together, they will blink together again every ... seconds.
- Question 14 of 20Medium
The LCM of 10, 15, and 20 is ...
- Question 15 of 20Medium
The GCD of 45 and 60 is ...
- Question 16 of 20Hard
Mr. Budi shares 36 books and 48 pencils among some children with equal amounts. The greatest number of children who can receive them is ...
- Question 17 of 20Hard
Ali swims every 4 days and Budi every 6 days. They swim together on March 1. They will swim together again on ...
- Question 18 of 20Hard
Bus X arrives every 15 minutes, bus Y every 20 minutes, and bus Z every 30 minutes. If all three arrive together at 08.00, they will arrive together again at ...
- Question 19 of 20Hard
The GCD of 72 and 108 is ...
- Question 20 of 20Hard
A shop puts 144 pencils and 180 pens into boxes. Each box has equal amounts of pencils and pens. If as many boxes as possible are made, the number of pencils per box is ...