Question

What will be the digit of the square of b) 26387 a) 81​

Answer 1

Complete step by step solution:

We know that the unit digit of the square of a number is equal to the square of the unit digit of that number.

Here, the unit digit of the number is 7.

Now we will find the square of the number 7. So, we get

${7}^{2} = 7 \times 7 = 49$

The unit digit of the square of number 7 is 9.

Therefore, the unit digit of the square of 26387 is also 9.

Hence, 9 is the unit digit of the square of 26387.