Question

what will be unit digit of prpduct of square of first 9 natural numbers ?​

Answer 1

Answer:

The unit digit of a perfect square can be only 0, 1,4,5,6 9.

1 &9 unit place end with 1

2 & 8 end with 4

3 & 7 end with 9

4 & 6 end with 6

5 unit place ends in 5

1 × 4 × 9 × 6 × 5 × 6 × 9 ×4 × 1 = 2,32,280

unit digit is 0