Free Practice Question
PS · Problem Solving
505-555
Exponents/Powers
When dividing by 10, what is the remainder?
Answer Choices
Correct answer marked below1
Correct
B
3
C
7
D
8
E
9
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Explanation
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Official Explanation
Official
To find the remainder of when divided by 10, we need to determine the unit digit of . The unit digits of powers of 7 cycle through 7, 9, 3, and 1. This cycle has a length…
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Comments
2
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P
priankaApr 2, 2024
Greatt
J
JillianJan 24, 2024
Thanks
What this question tests
What it tests
Your grasp of exponent rules — multiplying and dividing powers, power-of-a-power, and negative/zero exponents.
Common trap
Adding exponents when multiplying bases that have the same exponent, or confusing (x^a)^b with x^(a·b).
Details
Difficulty
505-555
Type
PS
Category