Question

what will be the unit digit of square 6667​

Answer 1

Answer:

square of 6667 is 44448889

so the answer is 9

Answer 2

The units digit will be nine. We're multiplying the same number by itself, so it's easy to predict the units digit, because the units digit of the whole number would be the units digit of the square of the units digit of the given number.
It works a bit like this:
Your number is: 6667
Square of the units digit: 7*7=49
Units digit of the so obtained square: 9
Hence units digit of the final number: 9
Thanks for your question!