Verbal Reasoning - Mental Ability Questions

In the following question, correct the equation by interchanging the two signs.
6 ÷ 17 x 51 + 6 – 12 = – 4

Amit and Ritu are a couple. Mrinal and Shonal are brothers. Mrinal is the brother of Ritu. How is shonal related to Amit?

If "+" means "minus", "x" means "divided by", "÷" means "plus" and "-" means "multiplied by", then
76 x 4 + 4 – 12 ÷ 37 = ?

In a certain code language, "REMINDER" is written as "SFNJMCDQ". How is "STANDARD" written in that code language?

Select the missing number in the given question?

In a row, pankaj is at 29th position from left and 33rd position from right. How many boys are there in the row?

In a certain code language, "COPIOUS" is written as "2345389" and "GENEROUS" is written as "16760389". How is "PIGEON" written in that code language?

The weights of 4 boxes are 20, 30, 50 and 70 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?