Odd number pair: second = n x (n + 1) or n x (n - 1)
This type of question, asked 4 times: 18 Jul 2023 S1, 10 Sep 2024 S2, 23 Sep 2024 S3, 24 Sep 2024 S2. All 4 questions below, oldest first.
Try each one first, then open its answer.
Question 1
18 Jul 2023 S1
16The 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.
Question 2
10 Sep 2024 S2
7Three of the following number-pairs are alike in some manner and hence form a group. Which number-pair does not belong to that group? (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 – Operations on 13 such as adding/subtracting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)Tap an option to check your answer.
Question 3
23 Sep 2024 S3
15Three of the following number-pairs are alike in some manner and hence form a group. Which number-pair does not belong to that group? (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 – Operations on 13 such as adding/subtracting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)Tap an option to check your answer.
Question 4
24 Sep 2024 S2
23The 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. (NOTE: The relation should be found without breaking down the numbers into its constituent digits)Tap an option to check your answer.