Mathematics
Factors, Multiples, LCM & GCD
Grade 4 · Elementary
Answer every question first, then press Finish to see your score and explanations.
- Question 1 of 20Easy
The factors of 12 are ...
- Question 2 of 20Easy
Which of the following is a prime number?
- Question 3 of 20Medium
The GCD of 12 and 18 is ...
- Question 4 of 20Medium
The LCM of 4 and 6 is ...
- Question 5 of 20Hard
Lamp A blinks every 6 seconds and lamp B every 8 seconds. If they blink together, after how many seconds will they blink together again?
- Question 6 of 20Easy
The multiples of 5 that are less than 30 are ...
- Question 7 of 20Easy
The factors of 18 are ...
- Question 8 of 20Easy
The smallest prime number is ...
- Question 9 of 20Easy
The prime factors of 10 are ...
- Question 10 of 20Medium
The GCD of 24 and 36 is ...
- Question 11 of 20Medium
The LCM of 8 and 12 is ...
- Question 12 of 20Medium
The common factors of 16 and 24 are ...
- Question 13 of 20Medium
The LCM of 5 and 7 is ...
- Question 14 of 20Medium
The least common multiple of 6 and 9 is ...
- Question 15 of 20Medium
The GCD of 30 and 45 is ...
- Question 16 of 20Hard
Two lamps light up together every 12 seconds and 18 seconds. After how many seconds will they light up together again?
- Question 17 of 20Hard
Mother has 24 cakes and 36 candies to be placed into bags with equal amounts. What is the greatest number of bags she can make?
- Question 18 of 20Hard
The LCM of 12, 15, and 20 is ...
- Question 19 of 20Hard
The GCD of 48 and 72 is ...
- Question 20 of 20Hard
Bus A departs every 15 minutes and bus B every 20 minutes. If both depart together at 08.00, at what time will they depart together again?