Free GMAT Practice Question

Question 1 of 1
ID: GMAT-DI-DS-035
Section: Data Insights - Data Sufficiency (DS)
Topic: Number Properties
Difficulty level: Medium

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If $k$ is a positive integer, what is the units digit of $3^k$?

  1. When $k$ is divided by $4$, the remainder is $2$.
  2. $k^2 + k = 42$
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