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Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusion(s) logically follow(s) from the statement(s).

Statements:
No father is a mother.
No mother is a son.

Conclusions:
(I) All mothers are fathers.
(II) No father is a son.

Which of the given letter-clusters will replace the question mark (?) in the following series to make it logically complete:

PCR45, MGO41, JKL37, ?

In a certain code language, ‘music is life’ is coded as ‘cd jk rs’ and ‘life is precious’ is coded as ‘ap cd jk’. How is ‘music’ coded in that language?

M, N, O, P, W, X and Y are sitting around a circular table facing the centre of the table. Only two people sit between X and W when counted from the right of X. Only two people sit between W and M when counted from the right of W. Only three people sit between X and N when counted from the right of X. P sits to the immediate left of Y. Who sits third to the left of O?

Refer to the following number and symbol series and answer the question that follows. Counting to be done from left to right only.

(Left) @ 4 6 8 * $ $ $ £ % 4 6 7 1 5 * 4 * 4 4 2 $ (Right)

How many such symbols are there, each of which is immediately preceded by a number and also immediately followed by a number?

Eight people – A, B, C, D, E, F, G and H are sitting around a circular table facing the centre. Only one person sits between A and B when counted from the right of A. E sits to the immediate left of A. Only three people sit between E and C when counted from the left of E. F sits third to the right of C. D sits to the immediate right of H. Who sits second to the right of G?

Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete? RV23, QU32, PT41, OS50, ?

If 2 is added to each odd digit and 2 is subtracted from each even digit in the number 3267451, what will be the difference between the highest and lowest digits in the new number thus formed?

In a certain code language,
A + B means ‘A is the sister of B’,
A @ B means ‘A is the brother of B’,
A - B means ‘A is the wife of B’
, A # B means ‘A is the father of B’.

How is O related to V if ‘O @ P # T + G - V’?

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 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.)
(15, 90, 6)
(13, 65, 5)