Verbal Reasoning - Mental Ability Questions

There is certain relationship between two given words on one side of : : and one word is given on another side of : : while another word is to be found from the given alternatives, having the same relation with this word as the given pair has. Select the best alternatives/ relationship.

Contamination : Food :: Infection : ?

If 3*1 = 20, 6*1 = 50 and 2*6 = -40, then find the value of 5*8 = ?

If 37*14 = 17,
69*33 = 34,
91*125 = 72
then what should 28*56 = ?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

H, K, N, ?, T, W, ?

If RESEARCH is $#!#%$&@ then SCARE is

In a code language, if LUCK is written as L2U1C3K1, then what is the last digit for the code for XEROX in that same language?

Venu is the Son of Avani and Amit is the son of Avani's brother. How is Amit's Mother related to Venu?

If "+" means "minus", "x" means "divided by", "÷" means "plus" and "-" means "multiplied by", then
76 x 4 + 4 – 12 ÷ 37 = ?