Question

We know that the product of two odd numbers is always odd.

There are 5 odd numbers from 1 - 10 and 5 odd numbers from 11 - 20, as well.

So, an odd product is possible only in the combinations where the 5 odd numbers from 1 - 10 are multiplied by the 5 odd numbers from 11 - 20.

Without counting, find the number of odd numbers among the 100 products in the grid.

Answer 1

Answer:

1+3+5+7+9+11+13+15+16+17+18+19

Step-by-step explanation:

It is the way of writing the answers ....