question_answer 3)

                The squares of which of the following would be odd numbers? (i) 431                                    (ii) 2826                (iii) 7779                               (iv) 82004.

Answer:

                (i) 431 \[\because \]     431 is an odd number \[\therefore \] Its square will also be an odd number. (ii) 2826 \[\because \]     2826 is an even number \[\therefore \] Its square will not be an odd number. (iii) 7779              \[\because \]     7779 is an odd number  \[\therefore \]                 Its square will be an odd number. (iv) 82004 \[\because \]     82004 is an even number \[\therefore \] Its square will not be an odd number.