Question

The unit's digit in the product (7^71 x 6^63 x 3^65) is

Answer 1

Hey sup!

As per the question,

7^71 x 6^59 x 3^65.

=(7^4)^17×7^3×6^59×(3^4)^16×3.

=(1)^17×3×6×(1)^16×3.

=1×3×6×1×3.

=54.

So 4 is the unit digit in the product of

7^71 x 6^59 x 3^65.

Hope this helps.