Select the option that is related to the fifth term in the same way as the second term is related to the first term and fourth term related to third term.
 14 : 21 :: 6 : 9 :: 12 : ?

Select the option that represents the letters that, when placed from left to right in the blanks, will complete the letter series.
 _ P N I E X _ N I E Y P N _ E Z P _ I _

Select the option that represents the letters that, when sequentially placed from left to right in the blanks below, will complete the letter series.
 _ a _ _ W a L W _ L _ W a L _ a _a W _ L

If I denotes ‘÷’, J denotes ‘×’, K denotes ‘−’ and L denotes ‘+’, then what will come in place of ‘?’ in the following equation?
 42 L 18 K (7 J 4) L (21 I 3) J 9 L 22 = ?

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.

Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.
 93 * 65 * 3 * 56 * 14 * 40

Select the option that is related to the fifth term in the same way as the second term is related to the first term and the fourth term is related to the third term.
 BROWSER : SERWBRO :: CAPTURE : URETCAP :: DESKTOP : ?

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.