Study the following graph carefully to answer the given questions

The efficiency of L is 25% more than P. L started a work alone and then P joined her 5 days before actual completion of the work. For how many days L worked alone?

What value will come in place of question mark (?) in the questions given below?
6⁹ × 36 ÷ 7776 = 6^? ÷ 216 

If one angle is half of its complementary angle, find that angle.

The ratio of officers to soldiers in a regiment before the war was 3 : 31. 6 officers and 22 soldiers were killed in the war and the ratio became 1:13. What was the number of officers in the regiment before the war?

Two circles having radii 5 units intersect each other in such a way that each of them passes through the centre of the other. Then the length of their common chord is

Length of train A is half as that of train B. Train A and B crosses the platform of length 100 meters in 5 seconds and 6 seconds respectively. If the ratio of speed of train A and B is 2 : 3, Find the length of train B.

If the least common multiple(LCM) of two numbers is 231, the Highest common multiple(H.C.F)  of both numbers is 11 and the first number is 77, then the second number is

Directions: The bar graph, given here, shows the number of tickets sold by 6 students A, B, C, D, E and F during a fair. 

Which student sold the least tickets?