Guess and verify the square root of:
a) 25 b) 64 c) 81 d) 100 e) 169
f) 225 g) 400 h) 4900 i). 39 × 39 j) 320 × 320

a) 25 = 5²
.^.. The square root of 25 is 5.
b) 64 = 8²
.^.. The square root of 64 is 8.
c) 81 = 9²
.^.. The square root of 81 is 9.
d)100 = 10²
.^.. The square root of 100 is 10.
e)169 = 13²
.^.. The square root of 169 is 13.
f) 225 = 15²
.^.. The square root of 225 is 15.
g)400 = 4 × 100 = 2² × 10² = 20²
.^.. The square root of 400 is 20.
h) 4900 = 49 × 100 = 7² × 10² = 70²
.^.. The square root of 4900 is 70.
i) The square root of 39 x 39 is 39.
j) The square root of 320 x 320 is 320.