Question

A teacher wants to give 3 markers to each of her 25 students. Markers come in packeges of 8

Answer 1

25x7=75 (need)

75/8=9.375
=10 as if you get 9 it will be too low

Answer 2

Ok, you know 8x3=24 so the answer will be at least 9 because 3x3=9.

8x9=72 and 25x3=75 so if you do 8x10 you get 80 and that's enough for each student with 5 left over.

So, the teacher will need 10 packages of markers.