Quantitative Aptitude - Arithmetic Ability Questions

A, B and C are three points on a circle with centre O. The tangent at C meets BA produced at T. If ∠ATC = 30° and ∠ACT = 48°,then what is the value of ∠AOB ?

In a triangle PQR, PX, QY and RZ be altitudes intersecting at O. If PO = 6 cm, PX = 8 cm and QO = 4 cm, then what is the value (in cm) of QY?

If [7(5x/3 - 3/2)]/2 + 3/2 = 1/4, then what is the value of x?

If the simple interest on Rs. 400 for 10 years is Rs. 280, then rate of interest per annum is

If 35% of (x + y) = 40% of (x – y), then x is what percentage of y?

If the shopkeeper sells an item at Rs 4400 which is marked as Rs 5000, then what is the discount that he is offering?

Select the odd word/letters/number/number pair from the given alternatives.

What is the value of (cos 40° – cos 140°)/(sin 80° + sin 20°)?