Question
Download Solution PDFIf N = 795 - 358, then the digit at the unit place of N is
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCalculation:
The unit place of 71 = 7, 72 = 9, 73 = 3, 74 = 1
The unit place of 795 = 723 × 4 × 73 = 3
The unit place of 31 = 3, 32 = 9, 33 = 7, 34 = 1
The unit place of 358 = 314 × 4 × 32 = 9
The unit of 795 is 3, which is less than 9
Then take 3 has 13 (by carry rule)
The unit place of N = 795 - 358 = 13 - 9 = 4
∴ The unit digit of N is 4
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