Question:

There are \(x\) number of sweets wrapped in a gift paper. Alison gives \( \frac{4}{7} \) of the total sweets to her friend Elena, and gives \( \frac{3}{5} \) of the remaining sweets to his friend Michael. Which of the following could be the original number of sweets which were wrapped in the gift paper? Indicate all possible options.

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In problems involving fractions of a total, always check divisibility by the denominators (or their LCM) to ensure integer results.
Updated On: Sep 30, 2025
  • 15
  • 25
  • 35
  • 56
  • 70
  • 95
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The Correct Option is C

Solution and Explanation

Step 1: Express sweets given to Elena.
Elena receives \( \frac{4}{7}x \). Thus, remaining sweets after Elena: \[ x - \frac{4}{7}x = \frac{3}{7}x \]
Step 2: Express sweets given to Michael.
Michael receives \( \frac{3}{5} \times \frac{3}{7}x = \frac{9}{35}x \).
Step 3: Conditions for divisibility.
For both Elena and Michael to receive integers, \( x \) must be divisible by 35 (LCM of 7 and 35).
Step 4: Check given options.
- 15: Not divisible by 35.
- 25: Not divisible by 35.
- 35: Divisible by 35.
- 56: Not divisible by 35.
- 70: Divisible by 35.
- 95: Not divisible by 35.
Thus, valid options are 35 and 70.
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