Multiple choice general knowledge math & puzzles

The cost price of 20 articles is the same as the selling price of x articles. If the profit is 25%, then the value of x is:

  1. 12

  2. 15

  3. 16

  4. 18
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

CP of 20 articles = SP of x articles. Given profit = 25%, so SP = 125% of CP. CP of 20 = SP of x means SP of 20 = 125% of CP of 20. Therefore, SP of 20 = 1.25 × CP of 20. If SP of x = CP of 20, then SP of x = SP of 20 / 1.25. So x = 20 / 1.25 = 16. Or: CP of 20 = SP of 16, meaning you sell 16 items to recover the cost of 20 items produced.

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