Find the unit's digit in (264)102 + (264)103.
Option:
A. 6
B. 4
C. 24
D. 0
E. 8
Answer: D . 0
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Justification:
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.