Question

Consider the 3 numbers 60,72 and 128 , then which of following is/are correct?

• A. L.C.M of $(60,72,128)=12160$
• B. L.C.M of $(60,72,128)=11500$
• C. H.C.F of $(60,72,128)=2$
• D. H.C.F of $(60,72,128)=4$

Answer 1

Answer: (A), (D)

Given: 3 numbers are $60,72,128$
$60 =2^2 \times 3 \times 5$
$72 =2^3 \times 3^2$
$128 =2^6$
(a) $\therefore$ LCM of $(60,72,128)=2^6 \times 3^2 \times 5$ $=12160$
(d) H.C.F of $(60,72,128)=2^2=4$