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If 'A' stands for '÷', 'B' stands for 'x', 'C' stands for '+' and 'D' stands for '-', what will come in place of the question mark (?) in the following equation?

21 B 4 D 72 A 8 C 7 = ?

In a certain code language, 'we are here' is written as 'yt bg ji' and 'you know we' is coded as 'kl bg gb'. How is 'we' coded in that language?

In the following number-pairs, the second number is obtained by applying certain mathematical operation(s) to the first number. Select the number-pair in which the numbers are related in the same way as are the numbers of the following pairs.

(

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 to/subtracting from/multiplying with 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)

9,85

8,68

Each of P, Q, R, S, T, U and V has an exam on a different day of a week, starting from Monday and ending on Sunday of the same week. U has an exam on Wednesday. Exactly 4 people have exams between P and V, neither of whom has an exam on Monday. Q has an exam immediately before R and S has an exam immediately after R. T has an exam immediately before P. How many people have exams between U and V?

What should come in place of the question mark (?) in the given series?

6 9 21 39 81 ?

Refer to the given letter series and answer the question that follows. Counting to be done from left to right.

(Left) CCQOISJSMXHUVQRHDPCHY (Right)

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

P, Q, R, S, T, U and V are sitting in a row, facing north.

Only two people sit to the left of Q. Only three people sit between Q and S. Only one person sits between S and V. U sits to the immediate left of P. T is not an immediate neighbour of S. How many people sit between U and V?

What should come in place of the question mark (?) in the given series?

11 17 32 58 93 139 ?

Refer to the following letter and symbol series and answer the question that follows.

Counting to be done from left to right only.

(Left) RLZT@$ODU%WN#*KXV£YA & QPS (Right)

How many such letters are there that are immediately preceded by a letter and also immediately followed by another symbol$?

Select the pair that follows the same pattern as the one followed by the two pairs given below. Both pairs follow the same pattern.

YGB: WJX

ΝΑΙ : LDE