The squares of which of the following would be odd numbers?
(i) 431 (ii) 2826 (iii) 7779 (iv) 82004
The square of an odd number is always odd and the square of an even number is always even.
Since 431 and 7779 are odd numbers, their squares will also be odd numbers.
Let's understand in detail.
We know that when the unit's digit of a number is 1 or 9, the square of the number will also have the unit digit ending with 1. Thus the square of 431 and 7779 will have their unit digit as 1 and thus they will be odd numbers.
The squares of which of the following would be odd numbers? (i) 431 (ii) 2826 (iii) 7779 (iv) 82004
NCERT Solutions for Class 8 Maths - Chapter 6 Exercise 6.1 Question 3
The squares of 431 and 7779 are odd numbers as the unit digit of these numbers are odd as well.