Quantitative Aptitude - Arithmetic Ability Questions

The value of cos220°+cos270° is

The price of an article is decreased by 10%. To restore it to its former value, the new price must be increased by

If (4a-3)2=0,then the value of 64a3+12a+13 is

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?

The marked price of a helmet is 30% more than its cost price. If the helmet is sold for Rs 744 after a discount of Rs 36, then what will be the profit percentage?

For x = 462+3, what is the value of x+22x-22+x+23x-23

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?

If Rs. 10000 amounts to Rs. 11664 invested in compound interest(compounded annually) for two years then the annual rate of compound interest is