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The units digit of any number is the number in the ones position. For example, the units digit of 123 is 3; 2324 is 4; and 87321 is one. The reason the answer is 5 for 5 raised to any positive integer is because 5 will always be in the units position. For example, 52 = 25; 53 = 125; 54 = 625; and so on.

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โˆ™ 2014-01-19 01:28:19
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Q: Why are the units digit of any positive integer power of 5 will always be 5?
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