Question

${25555}^{2}$

Answer 1

HELLO DEAR,

(25555)² = 653058025

let me explain

extend 25555 in two parts we get

2555 and 5

then we take the Square of 5

we already knows the square of 5 is 25

and in 2555 multiply it with (2555+1) i.e. 2556

we get,

2555×2556 = 6530580

now write the last no. as well as

we get,

653058025

Formula for If you want to take the square of any number in which the last digit is 5
two no . like p5

where p is any natural no.

then

take Square of 5 is 5²
and
p×(p+1)

no. will be [p×(p+1) 25]

we extend it in two parts

e.g, let the no. be 25

extend it in two parts

we get, 2 and 5

apply the rules

5²=25

2×(2+1)= 2×3=6
hence Square of 25 is 625

another no. 35

5²=25

3×(3+1) =3×4 = 12

hence Square of 35 is

1225

I HOPE ITS HELP YOU DEAR,
THANKS