Difference of two numbers is 1890. If 12.5% of one number is 17.5% of the other number, Find the two numbers.

A and B start at the same time with speeds of 40 km/hr and 50 km/hr respectively. If in covering the journey A takes 15 minutes longer than B, the total distance of the journey is

24% of 680 + 16 % of 525 – 22% of 450 =?

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

24, 25, ?, 41, -8, 73

Two students appeared for an examination. One of them secured 9 marks more than the other and his marks were 56 % of the sum of their marks. The marks obtained by them are 

X can do a piece of work in 24 days. When he had worked for 4 days, Y joined him. If complete work was finished in 16 days, Y can alone finish that work in :

Area of the smallest square that can circular ring enclosed Ween of area 616 cm² is 

 $${a\over b}={2\over3}$$ and $${b\over c}={4\over5}$$ then the ratio  $${a+b}\over {b+c}$$ equal to: