Find the units digit of the number 73603
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Question
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Transcribed Image Text:Find the units digit of 3227
Solution:
The units digit of a number can be found by finding the remainder when the number is
divided by 10. Hence, we use mod 10.
Now,
3² = (-1)mod 10
(32)113= (-1)113 mod 10
3226-1 mod 10
9-1 mod 10
3.9 3.(-1) mod 10
27= -3 mod 10
7= -3 mod 10
This implies that the units digit of 3227 is 7
Transcribed Image Text:Find the units digit of the number 73603
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