In a division operation, the divisor equals ten times the quotient and also equals five times the remainder. If the remainder is 46, find the dividend.

Difficulty: Easy

Correct Answer: 5336

Explanation:


Introduction / Context:
This problem connects the four elements of a division algorithm: dividend, divisor, quotient, and remainder. Using the given proportional relationships, you can determine the divisor and quotient, then reconstruct the dividend through the standard identity Dividend = Divisor * Quotient + Remainder.


Given Data / Assumptions:

  • Remainder R = 46.
  • Divisor D = 5 * R.
  • Divisor D = 10 * Quotient Q.
  • Division identity: Dividend N = D * Q + R.


Concept / Approach:
First compute D from the remainder. Then use D = 10Q to find Q. Finally, apply N = DQ + R. This sequence avoids guesswork and keeps arithmetic simple and exact.


Step-by-Step Solution:

Compute D: D = 5 * 46 = 230.Find Q from D = 10Q → Q = D / 10 = 23.Compute N: N = D * Q + R = 230 * 23 + 46.Evaluate: 230 * 23 = 230 * (20 + 3) = 4600 + 690 = 5290; then N = 5290 + 46 = 5336.


Verification / Alternative check:
Check proportions: D = 230 is five times 46 and ten times 23. Substituting into N = DQ + R reproduces the given remainder exactly.


Why Other Options Are Wrong:
5388, 5343, 5391, and 5328 do not satisfy the division identity with D = 230, Q = 23, and R = 46.


Common Pitfalls:
Confusing which term is 10 times which (mistaking Q = 10D), or omitting the remainder when reconstructing the dividend.


Final Answer:
5336

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