Question

which of 132^2, 87^2, 72^2, and 209^2 , would end with digit 1

Answer 1

Answer:

209^2

Step-by-step explanation:

the first digit of square of any number is equal to first digit square of the first digit

ex 9^2=81

here 1 is the first digit so in 209^2 the first digit will be 1