Question

Look at this pattern: 1,4,9,16,__,__,__,.....

What do you think the last digit of a square number could be?

Answer 1

1,4,9,16,25,36,49

Explanation:

The pattern is :

1,4,9,16,_,_,_,...

First no is 1

Second no is 4

Third no is 9

Fourth no is 16

Difference between second and first no. = 4-1 = 3

Difference between third and second no. = 9-4= 5

Difference between fourth and third no. = 16-9 = 7

Fifth no is :

16 + 9 = 25

Sixth no is : 25 + 11 = 36

Secenth no. is : 36 + 13 = 49

Hence, the pattern is :

1,4,9,16,25,36,49