If N = (307) 38 + (524) 20 , then what is the unit digit of N?
5
The correct answer is 5.
Sum Unit Digit To find the unit digit of N , we add the unit digits of the two terms we calculated: Unit Digit of N = (Unit Digit of (307) 38 ) + (Unit Digit of (524) 20 ) Unit Digit of N = 9 + 6 Unit Digit of N = 15 The unit digit of 15 is 5. Final Unit Digit Result The unit digit of N = (307) 38 + (524) 20 is 5.
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