The greatest number that divides 210, 1245 and 2160 is:
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 15.
Prime factors:
⇒ 210 = 2 × 3 × 5 × 7
⇒ 1245 = 3 × 5 × 83
⇒ 2160 = 24 × 33 × 5
Common factors: 3 and 5
HCF = 3 × 5 = 15