Quantitative Aptitude - Arithmetic Ability Questions

The value of cos220°+cos270° is

When a number is increased by 120, it becomes 130% of itself. What is the number?

The average age of 24 students is 12 years. It was observed that while calculating the average age, the age of a student was taken as 14 years instead of 8 years. What will be the correct average age (in years)?

The average height of 40 sticks is 154 cm. Some sticks of average height 160 cm are taken out. If the new average height is 150 cm, then how many sticks are remaining?

A shopkeeper purchased 510 eggs at the rate of Rs. 20 per dozen. 30 eggs were broken on the way. In order to make a gain of 20%, he must sell the remaining eggs at the rate of

A man travels 800 km in partly by rail and partly by steamer. He spends 7 hours more time on steamer. If the velocity of the steamer is 20 km/hr and the velocity of rail is 55 km/hr, how much distance does he cover by steamer?

Rs. 490 is divided among A, B and C such that A's share is half that of B's and thrice that of C's. What is C's share?

The diameter of a circle is equal to the side of the square. What is the area of the square if the area of the circle is 64π sq cm?