What will be the least number which when doubled will be exactly divisible by 12, 18, 21 and 30 ?
A. 196
B. 630
C. 1260
D. 2520
Answer:B
What will be the least number which when doubled will be exactly divisible by 12, 18, 21 and 30 ?
A. 196 B. 630 C. 1260 D. 2520
Explanation: 12 x 3 x 2 x 3 x 7 x 5 = 1260 L.C.M. = 2 x 3 x 2 x 3 x 7 x 5 = 1260,(1260 2) is the required number.,equals 630.