Just observe the unit digits and state which of the following are not

1.	Just observe the unit digits and state which of the following are not perfectsquares1.(i) 3136 (i) 3722 iii) 9348 (iv) 2304 (v) 8343
Answer» Any number is perfect square if its unit digit is sqaure of some natural number. i) √(3136) = 56, perfect square , as unit digit is 6 so 6² is possible. ii) 3722, not perfect square as square of any any natural number is not 2. iii) 9348, not perfect square as square of any any natural number is not 8. iv) 2304, possible as last digit is 4 and 2 and 8 have square whose unit digit is 4.√(2304) = 48 v) 8343, not perfect square as square of any any natural number is not 3.

Just observe the unit digits and state which of the following are not perfectsquares1.(i) 3136 (i) 3722 iii) 9348 (iv) 2304 (v) 8343

Answer»

Any number is perfect square if its unit digit is sqaure of some natural number.

i) √(3136) = 56, perfect square , as unit digit is 6 so 6² is possible.

ii) 3722, not perfect square as square of any any natural number is not 2.

iii) 9348, not perfect square as square of any any natural number is not 8.

iv) 2304, possible as last digit is 4 and 2 and 8 have square whose unit digit is 4.√(2304) = 48

v) 8343, not perfect square as square of any any natural number is not 3.