Question

Find the least number which becomes exactly divisible by 16, 28, 40 and 77 when 29 is addedto it.​

Answer 1

16 = 2 × 2 × 2 × 2

28 = 2 × 2 × 7

40 = 2 × 2 × 2 × 5

77 = 7 × 11

LCM = 2 × 2 × 2 × 2 × 5 × 7 × 11 = 6,160

6,160 - 29 = 6,131

The number is 6,131.