Question

On the playground, if the children are made to stand for drill either 20 to a row or 25 to a row, all rows are complete and no child is left out. What is the lowest possible number of children in that school?

Answer 1

Answer:

lowest possible number of children in that school = 100

Step-by-step explanation:

Child to stand either 20 in a row or 25 in a row& no child left out

so number of students = 20a  or 25b

So we need to find the LCM of 20 & 25 to find lowest possible number of children in that school

20 = 2 * 2 * 5

25 = 5 * 5

LCM = 2 * 2 * 5 * 5  = 100

lowest possible number of children in that school = 100