Question

radhika had a certain number of stamps. she can arrenge them in 10 identical rows without any stamp being left over. she can also arrenge them in 15 rows without any stamp being left over. from this we can definitely say that the no. of stamps that she has
A) is a factor of 30
B) is a factor of 25
C) is a multiple of 150
D) is a multiple of 30

Answer 1

ans:- D

let the no of of stamps radikha have=x

The x is completely divided by the 10 and 15 leaving no remainder.

So from the given situtation we have to find the L.C.M which is completely divided by 10 and 15.

the LCM of 10 and 15 is 30.

so the smallest number is 30 which is divided by 10 and 15 and next numbers which will satisfied the condition will be the multiple of 30.