If 80&10 = -8, 50&2 = -25 and 80&16 = -5, then find the value of 20&5 = ?

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

24 ÷ 8 x 25 + 8 - 3 = 2

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

3 - 10 + 40 x 80 ÷ 6 = ?

 In a certain code language, “MAKERS” is written as “KAMSRE” and “SINGER” is written as “NISREG”. How is “TRADER” written in that code language?

From the given alternatives, select the word which CANNOT be formed using the letters of the given word.

Unwarranted

Rakesh’s present age is 36 years. If 12 years ago, Deepak’s age was one-fourth of Rakesh’s age, then after 27 years what will be the age (in years) of Deepak?

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

GHXT, JKUQ, MNRN, PQOK, ?

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

23, 23, 46, 138, 552, ?