Question

What will be the units digit of the square of the following numbers?

(i) 39 

(ii) 297 

(iii) 5125 

(iv) 7286 

(v) 8742

Answer 1

Number	Square of the units digit	Units digit of a squared number
i) 39	92 = 9 x 9 = 81	1
ii) 297	72 = 7 x 7 = 49	9
Iii) 5125	52 = 5 x 5 = 25	5
iv) 7286	62 = 6 x 6 = 36	6
v) 8742	22 = 2 x 2 = 4	4