Discussion
What is the unit digit in the product \((365 \times 459 \times 781)\)?
Answer: C
To find the unit digit of a product, we only need to multiply the unit digits of the numbers.
The unit digits are 5 (from 365), 9 (from 459), and 1 (from 781).
Unit digit of the product = Unit digit of \((5 \times 9 \times 1)\).
Unit digit of \((45 \times 1)\) = Unit digit of 45, which is 5.
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