Which element of Group 17 has two isotopes of masses 35

Which number will replace the question mark (?) in the following number series?

  5, 7, 9, 11, 18, ?, 34, 35, 59, 67

Find the next number in the series.

17, 25, 52, 116, 241, 457, ?

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

Statement: FR ≥ S

Conclusions:

i) L > S

ii) L > R

Select the correct option from the following.

Select the option that represents the letters that, when sequentially placed from left to right in the blanks below, will complete the letter series.

Which option figure would come next in the following figure series?

Statements: All computers are laptops. Some laptops are heavy. All heavy is wood.

Conclusion I: All laptops are computers.

In a certain code language, 'COURAGE' is written as 'VPDQFHB' and 'MAGICAL' is written as 'HBNHMBD'. How will 'HOSTELS' be written in that language? 

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