Question

Find the least number which when increased by one is exactly divisible by 24,32 and 40

Answer 1

LCM of 24, 32 and 40

24 32 40 ) 2

12 16 20 ) 2

6 8 10 ) 2

3 4 5 )

= 2x 2 x 2 x 3 x 4 x 5

= 24x 4 x 5

= 480

it has to be increased by 1. so the required no. is 480