Verbal Reasoning - Mental Ability Questions

Which set of letters when sequentially placed at the gaps in the given letter series shall complete it?
J_J_L_KL_JK_MN

Find out the odd word/letters/number/number pair from the given alternatives.

If 80&10 = -8, 50&2 = -25 and 80&16 = -5, then find the value of 20&5 = ?

If 9*4 = 26, 4*4 = 16 and 3*6 = 18, then find the value of 5*2 = ?

Find the odd word/letters/number pair from the given alternatives.
(A) ZVR
(B) ZYX
(C ) QMI
(D) IEA

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series. 12, 60, 240, 720, ?

Rakhi got engaged 10 years ago. Rakhi's present age is 5/3 of her age at the time of engagement. If the present age of Rakhi's mother is twice that ofpresent age of Rakhi, then what was her mother's age (in years) at the time of her engagement?

In a certain code, if MIZZLY is written as ZIMYLZ and PUZZLE is written as ZUPELZ, then what will BUZZWORD be written as in the same code?