Sums of odd numbers

Exercise and reference answers

Questions

1. Answer

   9

   Question

   Sum of the first 3 odd numbers?

2. Answer

   25

   Question

   Sum of the first 5 odd numbers?

3. Answer

   100

   Question

   Sum of the first 10 odd numbers?

4. Answer

   150

   Question

   Total of each line in the magic square?

Instructions

Type the number only.

Explanation