Verbal Reasoning - Mental Ability Questions

In the following question, select the missing number from the given series.
2, 5, 17, 71, ?

In a certain code, 324 means 'are you alright', 783 means 'you come home' and 9271 means 'we are at home'. Which digit represents 'COME'?

If "–" means "divided by", "+" means "multiplied by", "÷" means "added to", "x" means "subtracted from", then 11 ÷ 6 – 2 + 5 x 3 = ?

Navjot starts moving towards the west. After covering some distance, he turns left and then takes a right. Which direction is he facing now?

If IMPLORE is coded as GKNJMPC, then how will HUB be coded as?

In a certain code language, "OCEAN" is written as "PEHES". How is "RIVER" written in that code language?

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

9 ÷ 12 - 15 + 4 x 10 = ?

There is certain relationship between two given words on one side of : : and one word is given on another side of : : while another word is to be found from the given alternatives, having the same relation with this word as the given pair has. Select the best alternatives/ relationship.

Funk : Vitamins :: Curie : ?