If a number leaves remainder 7 when divided by 15, what is the remainder when its cube is divided by 15?
Answer and explanation
Correct answer: 13
Step 1: For the cube, check (7^3=343). Step 2: (343=15\times22+13), so the remainder is 13. Step 3: In power questions, reduce remainders along the way to keep calculations short.
Frequently asked questions
What is the correct answer to this question?
13
Why is this the correct answer?
Step 1: For the cube, check (7^3=343). Step 2: (343=15\times22+13), so the remainder is 13. Step 3: In power questions, reduce remainders along the way to keep calculations short.
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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