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Question
Find the unit digit of 124128 × 126124
Solution
In 124128, the unit digit of base 124 is 4 and the power is 128 ...(even power)
Therefore, unit digit of 124128 is 4
Also in 126124, the unit digit of base 126 is 6 and the power is 124 ...(even power)
Therefore, unit digit of 126124 is 6
Product of the unit digits = 6 × 6 = 36
∴ Unit digit of the 124128 × 126124 is 6.
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