Question

write squares of first 20 natural numbers

Answer 1

can do it in the calculator also......

Answer 2

1 = 1
2 = 4
3 = 9
4 = 16
5 = 25
6 = 36
7 = 49
8 = 64
9 = 81
10 = 100
11 = 121
12 = 144
13 = 169
14 = 196
15 = 225
16 = 256
17 = 289
18 = 324
19 = 361
20 = 400