Question

Write the pattern used to find the square of the number containing ‘5’ in its unit’s
place?

Answer 1

Answer:

hi    

Step-by-step explanation:   I guess 15 is the number if the answer is correct then pls mark the answer as brainliest answer.

it is 15 as the square root of 15 is 225

Answer 2

Answer :i) 15 (ii) 95 (iii) 105 (iv) 205

(i) (15)2 = 1 x (1 + 1) x 100 + 25

= 1 x 2 x 100 + 25

= 200 + 25 = 225

(ii) (95)2 = 9 x (9 + 1) x 100 + 25

= 9 x 10 x 100 + 25

= 9000 + 25 = 9025

(iii) (105)2 = 10 x (10 + 1) x 100 + 25

= 10 x 11 x 100 + 25

= 11000 + 25 = 11025

(iv) (205)2 = 20 x (20 + 1) x 100 + 25

= 20 x 21 x 100 + 25

= 42000 + 25 = 42025

Hope it helps you