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Odd number pair: second = n squared plus or minus a fixed number

This type of question, asked 3 times: 18 Jul 2023 S4, 20 Jul 2023 S3, 21 Jul 2023 S1. All 3 questions below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    18 Jul 2023 S4

    4
    The second number in the given number-pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) is/are followed in all the number-pairs except one. Find that odd number-pair.

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  2. Question 2

    20 Jul 2023 S3

    24
    The second number in the given number pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) are followed in all the number pairs except one. Find that odd number pair.

    Tap an option to check your answer.

  3. Question 3

    21 Jul 2023 S1

    3
    The second number in the given number pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) are followed in all the number pairs, EXCEPT one. Find that odd number pair.

    Tap an option to check your answer.