Q34 of 200 Page 5

The number of common prime factors of 75, 60, and 105 is

Prime factors of 75 = 3, 5


Prime factors of 60 = 2, 3, 5


Prime factors of 105 = 3, 5, 7


Hence, common prime factors are 3 and 5


I.e. count = 2

More from this chapter

All 200 →
32

The sum of the prime factors of 1729 is

 33

The greatest number which always divides the product of the predecessor and successor of an odd natural number other than 1 is

 35

Which of the following pairs is not coprime?

 36

Which of the following numbers is divisible by 11?