Free Practice Question
PS · Problem Solving
705-805
Arithmetic
What is the units digit of 66^6 - 5^55?
Answer Choices
Correct answer marked belowA
0
B
1
C
5
D
6
9
Correct
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Explanation
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What it tests
Your fluency with the order of operations, fractions, decimals, and basic number sense — the foundation every quant question leans on.
Common trap
Applying the order of operations out of sequence or rounding intermediate values before the final step.
Details
Difficulty
705-805
Type
PS
Category