Multiple Choice Questions on If in the number 39 78742639258 39 the prime numbered digits are increased by 1 then how many such d........... for IBPS RRB - Officers Exam Preparation

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Multiple Choice Questions

If in the number 39 78742639258 39 the prime numbered digits are increased by 1 then how many such d...........

Logical Reasoning(IBPS RRB PO) arrangement and pattern
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    Directions: Study the information given below carefully and answer the questions that follow.

    Aman starts from point A and goes 10m east to reach point B and then takes a right turn and goes 8m to reach point C. From C he takes a right turn and travels 6m to point D and after reaching there he takes a left turn and walks 8m to reach point E. From point E he takes a left turn and walks 6m to finally reach point F. 

    If in the number '78742639258' the prime numbered digits are increased by 1, then how many such digits are there in the number thus formed which appear only once?

    This questions was previously asked in
    RRB PO Prelims (05 Aug, 2023 Shift 2)
    View All RRBA Previous Year Papers

    None

    Incorrect Answer

    One 

    Correct Answer

    Two 

    Incorrect Answer

    Three

    Incorrect Answer

    Four

    Incorrect Answer
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    Explanation:

    - First, let’s identify the prime numbered digits in '78742639258', which are 7, 2, 3, 5.

    - Increase each prime digit by 1: 7 becomes 8, 2 becomes 3, 3 becomes 4, and 5 becomes 6.

    - The new number will be: 88843649368.

    - We will now count the digits that appear only once in this new number.

    - In '88843649368':

    - 8 appears four times.

    - 4 appears twice.

    - 3 appears once.

    - 6 appears three times.

    - 9 appears twice.

    - Only the digit '3' appears once.

    - The number of unique digits that appear only once is:

    - Option: 2, One

    By: Parvesh Mehta
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