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Question

Choose the different number:

The correct answer is
36

The goal is to identify the number that is different from the others in the given list: 38, 39, 40, and 36.

Analyzing Number Properties

To find the different number, let's examine the properties of each number:

  • 38: It is an even number. Its factors are 1, 2, 19, 38. It is not a perfect square.
  • 39: It is an odd number. Its factors are 1, 3, 13, 39. It is not a perfect square. It is divisible by 3.
  • 40: It is an even number. Its factors are 1, 2, 4, 5, 8, 10, 20, 40. It is not a perfect square.
  • 36: It is an even number. Its factors are 1, 2, 3, 4, 6, 9, 12, 18, 36. It is a perfect square, as it equals $6 \times 6$ or $6^2$.

Identifying the Odd One Out

Comparing the properties:

  • Three numbers (38, 40, 36) are even, while one (39) is odd. If this were the criteria, 39 would be different.
  • Two numbers (39, 36) are divisible by 3, while two (38, 40) are not. This doesn't single out one number.
  • However, the number 36 is a perfect square ($6^2 = 36$), while 38, 39, and 40 are not perfect squares. This property uniquely identifies 36 as the different number among the options.

Conclusion

The number 36 stands out because it is the only perfect square in the list. Therefore, 36 is the different number.

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Important Questions from Odd Man Out

  1. Four letter-clusters have been given, out of which three are alike in some manner and one is different. Select the one that is different. The odd one out is not based on the number of consonants/vowels or their position in the letter cluster.

  2. The same operation(s) are followed in all the given number pairs except one. Find that odd number pair. (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/deleting/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.)

  3. Three of the following numbers are alike in a certain way and one is different. Pick the odd one out. (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/deleting/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.)

  4. 'डटे रहना' (Persist), 'रुकना' (Endure) से उसी प्रकार संबंधित है, जिस प्रकार 'टालना' (Stall) से __________ 'से संबंधित है।

  5. Identify the figure given in the options which when put in place of ? will logically complete the series.

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