If $$ {1+sinθ\over {1-sinθ}}={p^{2}\over{q^{2}}}$$, then sec θ is equal to:

What should come at place of question mark (?) in the following number series?

1.7 5.4 19.2 80.8 409 ?

A reduction of 20% in the price of sugar enables a housewife to purchase 6 kg. more for Rs. 240. What is the original price per kg. of sugar?

What value will come in place of question mark (?) in the questions given below?

837 ÷ ? × 0.8 = 9.3 

Comprehension: Read the following chart and answer the following questions.

What is the difference between the day that had maximum deaths to the day that had minimum deaths? 

The exterior angle of a regular polygon is one-third of its interior angle, the number of sides of the polygon is -

If 20% of (A + B) = 30% of (A − B), then what percentage of B is equal to A?

S is 20% more than T. T is 10% less than U. What is the ratio of S to ?