Question

Find the unit place in (194)102+(294)103

A) 0 B) 6 C) 8 D) 2

Answer 1

Answer:

Required unit's digit = unit's digit in (4)102 + (4)103.

Now, 42 gives unit digit 6.

.`.(4)102 gives unjt digit 6.

.`.(4)103 gives unit digit of the product (6 x 4) i.e., 4.

Hence, unit's digit in (264)m + (264)103 = unit's digit in (6 + 4) = 0.

Answer 2

Answer:

Basically we need to do que in minimum time so this ans may help in some cases

We know if

4 having even power i.e 4^2 then unit digit we get is 6

If 4 having odd power i.e 4^3 then unit digit we get is 4

So by adding unit digit i.e 6+4=10 hence we get 0 as unit digit