Correct option is D
Given:
42 → 36, 57 →144 , ?→ 81
Logic : square the sum of the digits.
For 42: 4 + 2 = 6, then 62 = 36.
For 57: 5 + 7 = 12, then 122 = 144.
For ?→ 81
(4 + 5)2 = 9, then 92= 81.
Thus, correct option is (d).
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Question
42 is related to 36 following a certain logic. Following the same logic, 57 is related to 144. Which of the following numbers is related to 81 related using the same logic?
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The first two numbers are related in a certain way. Choose the correct option to replace the question mark (?) having the same relationship with the third term. 7 : 81 :: 13 : ?
- 2)In each of the following questions, two numbers are given which follow a certain logical or arithmetic relationship. Identify the same pattern and apply it to find the missing number in the second pair. Choose the correct option from the given alternatives.
25 : 30 :: 36 : ? - 3)Select the set in which the numbers are related in the same way as are the numbers of the following sets.
(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 – Operations on 13 such as adding/subtracting/multiplying to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)
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10 : 101
6 : 37
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