‘Nif’ gene is responsible

HJG : MOL ::  (?)  : WUX

Select a suitable figure from the answer figures that would replace the question mark (?) from question figure.

Identify the number, which when added to itself 18 times gives 836.

Which two numbers from amongst the given options should be interchanged to make the given equation correct?

(240 ÷ 2 + 5) × 8 + 15 × 8 = 100

M/14 : O/12 : : U/6 : ?

Select the related letters/word/number from the given alternatives:

36 : 216 :: 43 : (?)

Select the option that is related to the third number in the same way as the second number is related to the first number.

31 : 90 :: 43 : ?