Find the HCF of 153, 117 and 405.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 9.
HCF of 153, 117, and 405:
Prime factors of 153 = 3 × 3 × 17
Prime factors of 117 = 3 × 3 × 13
Prime factors of 405 = 3 × 3 × 3 × 3 × 5
Common factors = 3 × 3 = 9