Study the given pattern carefully and select the number that can replace the question mark (?) in it.
 First row - 15, 11, 43
 Second row - 13, 8, 48
 Third row - 9, 7, ?
 (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)

In a certain code language, 'BOSS’ is coded as '21967' and 'DEAL' is coded as '19192414'. How will 'GAIN' be coded in that language?

A # B means ‘A is the sister of B’.
A @ B means ‘A is the son of B’.
A & B means ‘A is the father of B’.
A % B means ‘A is the mother of B’.
If W & Q # T & Y @ M % K, then how is W related to K?

Which two numbers from amongst the given options should be interchanged to make the given equation correct?
 248 ÷ 4 + 184 ÷ ( 4 × 6 – 2 × 8) = 77

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

Option

In a certain code language, 'CHILDREN' is written as ‘FKLOGUHQ’ and ‘SCHOOL’ is written as ‘VFKRRO’, how will 'CLASSROOM' be written in that language?

Select the option that is related to the fifth number in the same way as the second number is related to the first number and the fourth number is related to the third number.
 6 : 125 :: 2 : 1 :: 5 : ?

In a certain code language, 'PLAYGROUND' is written as ‘OKZXFQNTMC’ and ‘SCIENCE’ is written as ‘RBHDMBD, how will 'TYPEWRITER' be written in that language?