Question

5tens and 13ones is equal?

Answer 1

Think of the : as tens.
Think of the @ as ones.

: : : : : = 50

@ @ @ @ @ @ @ @ @ @ @ @ @ = 13

Now solve (equation below):
`50+13=63`

Answer 2

63
5 tens equals 50
13 ones equals 13
50 +13 = 63