Find the unit's digit in the product (2467)163 x (341)72.  Choose the correct choice from the following options.
A) 7  B) 5  C) 3  D) 4  E) 1
Clearly, unit's digit in the given product = unit's digit in 7153 x 172.   Now, 74 gives unit digit 1.   7^152 gives unit digit 1,   7^153 gives unit digit (l x 7) = 7. Also, 1^72 gives unit digit 1.   Hence, unit's digit in the product = (7 x 1) = 7   7nswer is 7.
<result>A</result>
Find the unit's digit in the product (2467)163 x (341)72.