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.

In a certain code language, 'HELP' is written as '1652432' and 'SAVE' is written as '381445'. How will 'MAIL' be written in that language?

Select the option that is related to the third term in the same way as the second term is related to the first term and the sixth term is related to the fifth term.
 5 : 14 :: 12 : ? :: 17 : 86

If P denotes ‘×’, Q denotes ‘÷’, R denotes ‘+’ and S denotes ‘−’, then what will come in place of ‘?’ in the following equation?
 (40 Q 4) P 5 R (3 P 6) S (7 P 8) R 21 =?

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.
 SOCCER : OSFFRE :: ROLLER : OROORE :: TOPPER : ?

In a certain code language, if storm = 15, apple = 6, virtue = 35, then cupboard =?

Select the letter that will replace the question mark (?) in the given letter series.
 a, d, h, n, ?

Select theoption 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.

13 : 195 :: 7 : 63 :: 18 : ?