Question

3. The squares of which of the following would be odd numbers?
(1) 431
(ii) 2826
(ii) 7779
(iv) 82004

Answer 1

Answer:

the squares of 431 and 7779 would be odd numbers

Step-by-step explanation:

431 sqaure will end with 1

2826 square will end with 6

7779 square will end with 1

82004 square will end with 6

the squares of 431 and 7779 would be odd numbers

Answer 2

Answer:

431 and 7779

Square of 2826 is even.

6 is in the units place.So the square would end with 6 in the units place as 6×6=36.

Square of 82004 is also even.

here 4 is in the units place.So the square would end with 4×4=16.

So these can't be the answers we're expecting.

Meanwhile, square of 431 would end with 1×1=1.

We can repeat the same process with 7779. In the last two cases the units place would end with odd numbers,hence the squares would be odd.

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