The sum of first four odd natural numbers is :

1. 2³

2. 2⁴

3. 4³

4. 4⁴

24² has n at its unit place, the value of n is:

1. 4

2. 16

3. 576

4. 6

Seeing the value of the digit at unit's place, state which of the following can be square of a number ?

(i) 3051

(ii) 2332

(iii) 5684

(iv) 6908

(v) 50699

Squares of which of the following numbers will have 1 (one) at their unit's place ?

(i) 57

(ii) 81

(iii) 139

(iv) 73

(v) 64