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
Numbers = 15, 30, and 40
The greatest number that divides them completely will be the HCF of these numbers.
15 = 3 × 5
30 = 2 × 3 × 5
40 = 2 × 2 × 2 × 5
HCF of 15, 30, 40 = 5
The greatest number that exactly divides 15, 30, and 40 is 5.