What should come in place of the question mark '?' in the following number series?

7, 13, ?, 49, 97, 193

How much percent above the cost price should a shopkeeper mark his goods so as to earn a profit of 10% after allowing a discount of 12% on the marked price? 

Directions: Student’s strength of a college in Arts, Science and Commerce from 2004-05 to 2007- 08 sessions are shown in the following bar graph. Study the graph and answer the questions

The ratio of average number of students in Arts to the average number of students in Commerce is

In ∆ABC, ∠A=90⁰ , AD is the bisector of ∠A meeting BC at D, and DE ⊥ AC at E. if AB = 10 cm and AC = 15 cm, then the length of DE, in cm, is:

Directions: Study the Bar diagram carefully and answer the questions. 

The Bar diagram shows the trends of foreign direct investment (FDI) into India from all over the World (in Rs. crores). 

The year which exhibited the 2nd highest growth percentage in FDI in India over the period shown is 

If and , then what is the value of A - B?

Directions : Read the graph and answer the following questions.

The number of years in which the income is more than the average income of the given years is

If x = 2 then the value of x³ + 27x² + 243x + 631 is