Question

The square of numbers 1,9,11,19and 21 ended with digit____


plz give the answer anyone ​

Answer 1

Answer:

1

Step-by-step explanation:

191119x191119=36526472616

and

21x21= 441. so 1 become common on unit place

Answer 2

Answer:

1

verification:

1x1 = 1

9x9 = 81

11x11= 121

19x19 = 361

21x21 = 441