Find the greatest number that exactly divides 15, 30 and 40.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 5
Given that
The greatest number that exactly divides 15, 30 and 40
The prime factorization of these numbers
15 = 3 × 5
30 = 2 × 3 × 5
40 = 2 × 2 × 2 × 5
Hence, the HCF of the number = 5