Please solve question 16

Dear Student,

1^{2} = 1, 3^{2} = 9, 5^{2} = 25, 7^{2} = 49, 9^{2} = 81 H e r e y o u c a n s e e t h a t s q u a r e o f o d d i n t e g e r i s o d d . T h e r e f o r e, s q u a r e o f a n y n u m b e r w h i c h h a v e 1 o r 9 i n u n i t p l a c e w i l l a l w a y s g i v e 1 i n u n i t p l a c e . L i k e 51^{2} = 2601 o r 59^{2} = 3481 I n t h e s a m e w a y, s q u a r e o f a n y n u m b e r w h i c h h a v e 3 o r 7 i n u n i t p l a c e w i l l a l w a y s g i v e 9 i n u n i t p l a c e F o r e x a m p l e, 47^{2} = 2209 o r 33^{2} = 1089 i n t h e s a m e w a y s q u a r e o f a n y n u m b e r w h i c h h a s 5 i n u n i t p l a c e w i l l g i v e 5 i n u n i t p l a c e . F o r e x a m p l e, 25^{2} = 625, 75^{2} = 5625

Regards,