Question

Which of 123square,77square,82square,161square,109square would end with digit 1

Answer 1

Answer:

161square

Step-by-step explanation:

in 123sq last digit

3×3=9 last digit

77sq

7×7=49 last digit 9

for 161sq

1×1=1

hence 161sq ends with 1

Answer 2

Answer:

161 square and 109 square