What is the smallest number that is a multiple of 13, 15, 4, 21 and 2?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 5460.
L.C.M by prime factorization method
⇒ 13 = 13 × 1
⇒ 15 = 3 × 5
⇒ 4 = 2 × 2
⇒ 21 = 7 × 3
⇒ 2 = 2 × 1
Hence,
L.C.M = 2 × 2 × 3 × 5 × 7 × 13 = 5460