If a number leaves remainder 5 when divided by 7, what is the remainder when its cube is divided by 7?
Answer and explanation
Correct answer: 6
Step 1: For the cube, consider (5^3=125). Step 2: (125=7\times17+6), so the remainder is 6. Step 3: In higher powers, reduce remainders along the way to keep calculation easy.
Frequently asked questions
What is the correct answer to this question?
6
Why is this the correct answer?
Step 1: For the cube, consider (5^3=125). Step 2: (125=7\times17+6), so the remainder is 6. Step 3: In higher powers, reduce remainders along the way to keep calculation easy.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Real Numbers. Topic: Euclid’s Division Lemma.
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