Verbal Reasoning - Mental Ability Questions

How many triangles are there in the given figure?

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

? , 9, 19, 39, 79

If "*" denotes "added to", "&" denotes "divided by", "@" denotes "multiplied by" and "%" denotes "subtracted from", then 399 & 19 @ 21 % 41 * 100 = ?

If '+' means '÷', '−' means '×' , '÷' means '+' and '×' means '−' , then 36×12+4÷6+2−3= ?

In the following question, select the related number from the given alternatives. 850 : 863 : : 430 : ?

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?

45 x 5 + 2 - 20 = ?

Select the Missing number?

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

OXXXXX, XXXXO, OXXX, XXO, OX, ?