Verbal Reasoning - Mental Ability Questions

In a certain code language, 'x' represents '+', '÷' represents 'x', '-' represents '÷' and '+' represents '-'. Find out the answer to the following question.

13 + 8 x 2 ÷ 25 - 10 = ?

Find the odd word/letters/number pair from the given alternatives.

In this question, the sets of numbers given in the alternatives are represented. The columns and rows of Matrix I are numbered from 0 to 4 and that of Matrix II are numbered from 5 to 9. A letter from these matrices can be represented first by its row and next by its column, e.g., A can be represented by 03,55, etc., and 'P' can be represented by 10, 44, etc. Similarly you have to identify the set for the word 'BOAT'.

The weights of 4 boxes are 90, 40, 80 and 50 kilograms. Which of the following cannot be the total weight, in kilograms, of any combination of these boxes and in a combination a box can be used only once?

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

TUW, ZAC, FGI, LMO, ?

Find out the odd word/letters/number/number pair from the given alternatives.

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
? , Microgram, Milligram, Gram

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series. NIP, KGO, HEN, ECM, ?