In a certain code language, 'VAIN' is written as

Select the missing term from the given number series:

1, 2, ?, 10, 17, 26 ...

Statements:

I. All buildings are towers.

II. No tower is a shop.

III. Some shops are offices.

Conclusions:

Find the missing number in the series: 2, 6, 12, ?, 30, 42

Which of the following numbers will replace the question mark (?) in the given series?

50, 86, ?, 127, 136, 140, 141

Statements:

All holders are hangers.

All hangers are hammers.

Some hammers are axes.

Conclusions:

Select the figure from among the given options that can replace the question mark (?) in the following series and complete the pattern.

How many times are the hands of a clock are at right angle in a day?

What will come in the place of the question mark (?) in the following equation, if '+' and '÷' are interchanged and '×' and '–' are interchanged?