Which of the following are critical

If the signs – and ÷ are interchanged, then which of the following equations would be correct?

Select the set in which the numbers are related in the same way as are the numbers of the given sets.

How many classes are there in the given picture?

Select the option that can replace the question mark (?) in the following figure series.

The equations in the statements represent the heights of the given letters. According to these equations, find who is the shortest amongst all.

Select the correct option that indicates the arrangement of the given words in the order in which they appear in an English dictionary.

In a certain code language, 'FORCE' is written as '641832' and 'MIST' is written as '1331920'. How will 'URANUS' be written in that language?

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

15, 27, 12, ?, 9, 33