Verbal Reasoning - Mental Ability Questions

In the following question, select the related number from the given alternatives.

15 : 17 : : 23 : ?

The following equation is incorrect. Which two signs should be interchanged to correct the equation?

5 - 12 + 15 ÷ 50 x 25 = 23

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

8: 32 : : ? : 108

The following equation is incorrect. Which two signs should be interchanged to correct the equation?

16 ÷ 6 + 35 x 9 - 15 = 31

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

2 : 10 : : 3 : ?

If 18$2 = 10, 8$4 = 6 and 12$18 = 15, then find the value of 7$9 = ?

Three of the following four are alike in a certain way and hence form a group. Which is the one that does not belong to that group?

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

ST : ZM : : KR : ?