A number which when divided by 10 leaves remainder of 9, when divided by 9 leaves a remainder of 8, and when divided by 8 leaves a remainder of 7, is: 

A solid wooden toy is in the shape of a right circular cone mounted on a hemisphere. If the radius of the hemisphere is 4.2 cm. and the total height of the toy is 10.2 cm., find the volume of the wooden toy (nearly).

40% of the employees in a factory are workers. All the remaining employees are executives. The annual income of each worker is Rs. 39000. The annual income of each executive is Rs. 42000. What is the average annual income of all the employees in the factory together?

Directions: Find the wrong number in the following number series:

2, 6, 10, 19, 36, 69, 134

The following histogram shows the height of players of a basketball team of a school.

How many players have height less than 141 cm?

By selling 25 m of cloth a man gains the selling price of 5 m of cloth. Find the gain percent?

The perimeter of an isosceles, right angled triangle is 2p unit. The area of the same triangle is

A lent some money from B and paid 1,573 after$$ {1{1\over 2}}$$ yr . Also B lent some money from A and paid 1444.50 after 6 months. If they want to settle the account forthwith, keeping 14 % as the rate of interest, then who should pay whom and how much?