Factor, Multiples and Primes

Which of numbers below are prime numbers?

• 27

• 17

• 77

• 7

What is two different prime numbers which sum is equal to 14?

• 11

• 7

• 5

• 3

What are two different prime numbers which sum equal to 28?

• 11

• 23

• 17

• 15

What are two prime numbers which sum equal to 26?

• 13

• 23

• 3

• 17

Which of these are factor of 36

• 6

• 9

• 3

• 8

Which of these are factors of 49

• 1

• 8

• 7

• None of above

How many factors of 50?

• 6

• 10

• 4

• 5

a x b x c = 180. What are possible numbers of a, b and c?

• 20, 30, 20

• 30 x 30 x 20

• 45 x 2 x 2

• 9 x 2 x 10

p x q x r = 240. What are possible number represent p, q and r?

• 3

• 4

• 5

• 20

What are the common multiples of 6 and 9?

• 63

• 54

• 36

• 72