Tristeza is a virus disease

In a certain code language, '274' means 'you are fool', '137' means 'Rohan is fool', and '893' means 'Riya likes Rohan'.

‘CAPACITY’ is coded ’81 and ‘VOLUME’ is coded as ‘91’, then how will ‘AMOUNT’ be coded?

Select the Venn diagram that best illustrates the relationship between the following classes.

Pens, Books, Erasers

In the following question, select the figure which can be placed at the sign of question mark (?) from the given alternatives.

Which of the answer figures is the exact mirror image of the given problem figure when the mirror is held at the right side?

Problem figure:

What should come in place of? in the given series based on the English alphabetical order?

ΤΟΥ, UQB, VSE, WUH, ?

Select the letter-cluster from among the given options that can replace the question mark (?) and continue the given series.

KWX, NSA, QOD, TKG, WGJ, ?

Select the Venn diagram that best illustrates the relationship between the following classes.

Fathers, Brothers and Males

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

50, 52, 56, 64, 80, ?