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Subjects
Class 10MathematicsReal NumbersEuclid’s Division LemmaHardLevel 1
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A number leaves remainder 4 when divided by 5. What is the remainder when its square is divided by 5?

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Answer and explanation

Correct answer: 1

Step 1: The square remainder comes from dividing (4^2=16) by 5. Step 2: (16=5\times3+1), so the remainder is 1. Step 3: A remainder one less than the divisor often gives square remainder 1.

Related tags

Euclids-Division-LemmaSquare-RemainderModular-Thinking

Frequently asked questions

What is the correct answer to this question?

1

Why is this the correct answer?

Step 1: The square remainder comes from dividing (4^2=16) by 5. Step 2: (16=5\times3+1), so the remainder is 1. Step 3: A remainder one less than the divisor often gives square remainder 1.

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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10 more MCQs
  1. 1In Euclid’s Division Lemma, if (a) and (b) are positive integers, which condition is correct for the remainder (r)?
  2. 2If (35=6q+r) and (0 \le r < 6), what are the values of (q) and (r)?
  3. 3Which is the standard form of Euclid’s Division Lemma?
  4. 4If a number leaves remainder (0) when divided by (9), in which form can it be written?
  5. 5What possible remainders can occur when an integer is divided by (5)?
  6. 6What is the remainder when (52) is divided by (7)?
  7. 7Which condition is necessary for (b) in Euclid’s Division Lemma?
  8. 8If (a=17) and (b=4), which is the correct Euclidean form (a=bq+r)?
  9. 9How many possible remainders are there when a number is divided by (3)?
  10. 10If a number is odd, what remainder will it leave when divided by (2)?
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