Quantitative Aptitude - Arithmetic Ability Questions

Select the odd letters from the given alternatives.

A box of 20 items was bought for Rs. 6,400 after a discount of 20%. Find the cost of each item.

If a.sin 45°.cos 45°.tan60° = tan 245° ­ cos60° then find the value of a ?

The length of the diagonal and the breadth of a rectangle is 13 cm and 5 cm respectively. Calculate its area (in cm²).

The area of a square is equal to its side, if the side is 1 unit.

If x - 2y = 2 and 3x + y = 20, then the value of (x,y) is

What is the value of S = 11x3x5 + 11x4 + 13x5x7 + 14x7 + 15x7x9 + 17x10 + ... upto 20 terms. Then what is the value of S? 

A ladder 13 m long reaches a window which is 12 m above the ground on side of a street. Keeping its foot at the same point, the ladder is turned to the other side of the street to each a window 5m high, then the width of the street is :