Question

find the greatest number of four digit which must be added to 5231 so that the final number becomes exactly divisible by 12, 15, 27, 32 and 40

Answer 1

LCM of 12, 15, 27, 32, 40 = 1080

greatest 5 digit number = 9999

9999 + 5231 = 15230

15230 ÷ 1080 = 14 as quotient

so 1080 x 14 = 15120

15120 - 5231 = 9889

So 9889 is the greatest 4digit number which must be added to 5231

I think they give you multiple choices. If not, this is the greatest number.

Check:-   9889 + 5231 = 15120 ÷ 1080 = 14