What is the remainder when 7^10 is divided by 5?
✓ Correct Answer: Option D
The pattern of remainders when powers of 7 are divided by 5 is: 7^1≡2, 7^2≡4, 7^3≡3, 7^4≡1. The pattern repeats every 4 powers. Since 10 divided by 4 has a remainder of 2, 7^10 has the same remainder as 7^2, which is 4.
📚 About This GRE Exam Prep Practice Question
This 3-level GRE Exam Prep question from the Quantitative Reasoning topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.
How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free GRE Exam Prep practice test or use flashcards for spaced repetition review.