3. What will be the least number which when doubled will be exactly divisible by 12, 18, 21 and 30 ?
A. 2520
B. 1260
C. 196
D. 630
3. What will be the least number which when doubled will be exactly divisible by 12, 18, 21 and 30 ?
A. 2520
B. 1260
C. 196
D. 630