Three of the following four letter-clusters are alike in a certain way and one is different. Pick the odd one out.

Four letter-clusters have been given, out of which three are alike in some manner and one is different. Select the letter-cluster that is different.

Options:

Select the odd group of numbers. (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)

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Select the odd word/letters/number/number pair from the given alternatives.

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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.

Three of the following letter-clusters are alike in some manner and hence form a group. Which letter-cluster does not belong to that group?

Select the odd group of numbers. (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)

Select the odd word/letters/number/number pair from the given alternatives.

Option