Question

What are the largest 4 digits and smallest 3 digit number divdsible by 15?

Answer 1

Largest 4 digit number = 9999
Try to divide it by 15 :

$\frac{9999}{15} = 666 \frac{9}{15}$
So the largest 4 digit number divided by 15 is 9999-9 = 9990

Smallest 3 digit number = 100
Try to divide it by 15:

$\frac{100}{15} = 6 \frac{10}{15}$
So the smallest 3 digit number divided by 15 is = 100-10 = 90