The sum of three numbers is 252. If the first number is thrice the second and third number is two-third of the first, then the second number is

If a²+b²+c² = 2(a – b – c) – 3 then the value of 4a – 3b + 5c is 

A motorist and a scooterist made a journey of 120 km at the same time and from the same place. The graph shows the progress of the journey made by each person. Study the graph and answer the questions.

How far from the start, did the motorist meet the scooterist ? (in km ) 

A librarian purchased 60 story books for his library. But he found that he could get 4 extra books by spending Rs. 336 more and then the overall average price per book would be reduced by Re 1. The previous average price of each book was 

A business Rs. 3500 Starts from, after 5 months B becomes his partner, after one year the profit between the two is divided in the ratio of 2: 3, then find the capital investment of B.

The radius of circle is increased by 1%. How much does the area of the circle increased? 

The ratio between the ages of a father and his son four year ago was 19:6. If the difference between the ages of the father and son is 26 years, what will be the ratio of their present ages?

Direction : What value should come in the place of question mark (?) in the following questions?

$$ \sqrt{1089} + 3=(?)^2 $$