Squares of numbers ending with 5

Any number ending with 5 multiplied by any number ends with 5 or Zero
Multiply any two number ending with 5
5 x 25 = 125
5 x 45 = 225
5 x 15 = 75

‘Squares of numbers ending in 5’
5 x 5 = 25

152 = 15 x 15 =
Lets take the number 15. The last digit is 5 and the previous digit is 1. 'One more than the previous one' is our sutra 1+1=2.

5 x 5 = 25
1 x 2 = 2

So the answer is 225

15 X 15 = 225

25 X 25 = 625
Answer : (2 x (2+1) 25) = 625

35 x 35 = (3 x 4) 25 = 1225
95 x 95 = (9 x 10) 25 = 9025
125 x 125 = (12 x 13) 25 = 15625


EXERCISES :

1) 25 X 25 =
2) 55 X 55 =
3) 135 X 135 =
4) 155 X 155 =
5) 85 X 85 =
6) 95 X 95 =
7) 105 X 105 =
8) 115 X 115 =
9) 145 x 145 =
10) 65 X 65 =
11) 75 X 75 =
12) 45 X 45 =
13) 145 X 145 =
14) 185 X 185 =
15) 195 X 195 =
16) 165 X 165 =
17) 225 X 225 =
18) 295 X 295 =
19) 305 X 305 =
20) 405 X 405 =
21) 525 X 525 =
22) 505 X 505 =
23) 255 X 255 =
24) 285 X 285 =
25) 235 X 235 =
26) 605 X 605 =
27) 715 X 715 =
28) 805 X 805 =
29) 675 X 675 =
30) 625 X 625 =
31) 675 X 675 =
32) 495 X 495 =
33) 445 X 445 =
34) 565 X 565 =
35) 545 X 545 =
36) 685 X 685 =
37) 775 X 775 =
38) 745 X 745 =
39) 895 X 895 =
40) 295 X 295 =