Verbal Reasoning - Mental Ability Questions

Find the missing number?

Arrange the given words in the sequence in which they occur in the dictionary.
1. Effacers
2. Effacing
3. Effaceable
4. Effacements
5. Effacement

If 'x' means 'addition', '­' means 'division', '/' means 'subtraction' and '+' means 'multiplication', then which of the equation is correct

If "A" denotes "added to", "C" denotes "divided by", "D" denotes "multiplied by" and "B" denotes "subtracted from", then
81 C 9 D 11 B 4 A 6 = ?

In the following question, select the related word from the given alternatives.
Mathematics : Formulas : : Chemistry : ?

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, ?

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

FGH, NOP, VWX, ?

If MACHINE is coded as 19-7-9-14-15-20-11, how will you code DANGER?