Question

3. The squares of which of the following would be odd numbers?
(1) 431
(i) 2826
C) 7779
(iv) 82013​

Answer 1

If the last digit of any number is odd ; then their square is also odd.

Therefore

option number 1 , 3 and 4 i.e 431 , 7779 and 82013

will give odd numbers after squaring.

hope it helps

#thanks

Answer 2

Answer:

1), C) and iv)

Step-by-step explanation:

1) 431 squared is equal to 185761 which is an odd number.

i) 2826 squared is equal to 7986276 which is NOT an odd number.

C) 7779 squared is equal to 60512841 which is an odd number.

iv) 82013 squared is equal to 6726132169 which is an odd number.