Quantitative Aptitude - Arithmetic Ability Questions

In ΔPQR, S and T are points on side PQ and PR respectively. ST is parallel to QR. If S divides PQ in the ratio 4:1 and length of QR is 15 cm,what is the length of ST?

Rohit buys a ball for Rs 450 and sells it. Rohit gives two successive discount of 20% and 5% to the customer. What will be the selling price (in Rs) of the ball?

What is the value of 2sec2A?

What is that least number that must be added to the product 684 × 686 to make it a perfect square?

In ΔABC, AD is the median and AD = (1/2)BC. If ∠ACD = 40°, then what is the value (in degrees) of ∠DAB?

Complete the number series by choosing the missing terms from the options. 32, 64, 256, 1536, ? ,122880,1474560

If 4x - 5y = -37 and 7x + y = -16, then x - y = ______

If (tanA ­- tanB)/(1 + tanAtanB) = x, then the value of x is