Multiple Choice Questions on On January 1st 2023 a person saved 1 On January 2nd 2023 he saved 2 more than that on........... for Civil Services Exam (CSAT) Preparation

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Multiple Choice Questions

On January 1st 2023 a person saved 1 On January 2nd 2023 he saved 2 more than that on...........

Math and Mental Ability Number System
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    On January 1st, 2023, a person saved 1. On  ?January 2nd, 2023, he saved 2 more than that on the previous day. On January 3rd, 2023, he saved 2 more than that on the previous day and so on. At the end of which date   was his total savings a perfect square as well a perfect cube?

    This questions was previously asked in
    UPSC CSAT, Previous year (2024)
    View All CSAT Previous Year Papers
    7th January, 2023  
    Incorrect Answer

    8th January, 2023

    Correct Answer

    9th January, 2023

    Incorrect Answer

    Not possible

    Incorrect Answer
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    Explanation:

    - On January 1st, the person saved 1 (total: 1).

    - On January 2nd, he saved 3 (total: 4).

    - On January 3rd, he saved 5 (total: 9).

    - On January 4th, he saved 7 (total: 16).

    - On January 5th, he saved 9 (total: 25).

    - On January 6th, he saved 11 (total: 36).

    - On January 7th, he saved 13 (total: 49).

    - On January 8th, he saved 15 (total: 64).

    - The total savings on January 8th, 2023 is 64, which is 8 squared (8x8) and 4 cubed (4x4x4).

    - Your understanding that by January 8th, the total savings become both a perfect square and a perfect cube is correct.

    By: Parvesh Mehta
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