1. Which set of numbers are divisible by both 3 and 5?
a) 240, 600 and 755
b) 230, 500 and 655
c) 330, 420 and 705
d) None of these
2. What are the prime factors of 216?
a) 2 X 2 X 3 X 3 X 3
b) 2 X 2 X 2 X 3 X 3 X 3
c) 2 X 2 X 2 X 3 X 3
d) None of these
3. Find the LCM of 45 and 60?
a) 180 b) 150
c) 160 d) None of these
4. Find the HCF of 25 and 70?
a) 25 b) 70
c) 1750 d) 5
5. All prime numbers are not coprime numbers. True / False
a) True b) False
6. 1 is a prime number. True / False
a) True b) False
7. _____ number is neither prime nor composite number.
a) 0 b) 2
c) 1 d) None of these
8. Every prime number is odd except _____.
a) 0 b) 1
c) 2 d) None of these
9. What are three multiples of 452?
a) 452, 904 and 1365
b) 452, 904 and 1356
c) 452, 940 and 1356
d) None of these
10. What are three common multiples of 100 and 150?
a) 300, 600 and 900
b) 100, 300 and 600
c) 300, 450 and 600
d) None of these