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 = ?

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

7 - 8 + 20 x 10 ÷ 9 = ?

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'.

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?

c_e_cd_f_de_

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

Khilji dynasty, ? , Sayyid dynasty, Lodi dynasty

Select the missing number from the given options?

Select the missing number.

The birth rate in India, Nepal, Sri Lanka, Bangladesh and Pakistan was calculated. The birth rate in Nepal is the lowest, while the birth rate in Pakistan is higher than that in Sri Lanka, and lower than that in India. The birth rate in Bangladesh is higher than that in Nepal, and lower than that in Sri Lanka. Which country has the highest birth rate?