Verbal Reasoning - Mental Ability Questions

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

18 ÷ 2 - 25 x 9 + 6 = 38

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

167 : 43 : : 245 : ?

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

ADH : ILP : : GJN : ?

DWT : GZW :: QPM : ___

Which number will complete the series?

6 , 8 , 17 , 19 , 28 , 30 , ?

Select the missing term based on the given related pair of letter clusters.

ABC : ZYX :: DEF : ____

In the following question, select the missing number from the given series.

831, 842, 853, 864, 875, ?

If 12@18 = -3, 18@6 = 6 and 16@8 = 4, then find the value of 6@10 = ?