Mathematics — Standard (041) — CBSE Class 10 board question

Option D: 924

$28 = 2^2 \times 7,\quad 44 = 2^2 \times 11,\quad 132 = 2^2 \times 3 \times 11$

LCM $= 2^2 \times 3 \times 7 \times 11 = 924$

LCM is the product of the greatest powers of all prime factors present. Here the primes are 2, 3, 7, 11 — take $2^2, 3^1, 7^1, 11^1$ and multiply. A common mistake is forgetting one of the prime factors (like 7 or 3), which gives a wrong smaller value. Always list prime factorisations first.