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Marked price, discount and profit on cost: find the missing one

This type of question, asked 4 times: CDS 2 2016, CDS 1 2022, CDS 1 2024, CDS 2 2025. All 4 questions below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    CDS 2 2016

    23
    A shopkeeper increases the cost price of an item by 20% and offers a discount of 10% on this marked price. What is his percentage gain ?

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  2. Question 2

    CDS 1 2022

    32
    A shopkeeper marks the price of an article at Rs. 200. After allowing a discount of 10%, he still gains 20% on the cost price. What is the cost price of the article?

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  3. Question 3

    CDS 1 2024

    5
    A person bought a book at 3/4th3/4^{\text{th}} of its listed price and sold it at 50% more than its listed price. What is the percentage of gain in the transaction ?

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  4. Question 4

    CDS 2 2025

    60
    A shopkeeper gives three consecutive discounts 10%10\%, 20%20\% and 25%25\% after which he sells the article at a profit of 8%8\% on the cost price. Had he sold the article after the first discount, how much profit would he have got?

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