Quantitative Aptitude - Arithmetic Ability Questions

In the given figure, SX is tangent. SX = OX = OR. If QX = 3 cm and PQ = 9 cm, then what is the value (in cm) of OS?

What is the value of sin (630 + A) + cos A?

What is the difference (in Rs) in Compound interest earned in 1 year on a sum of Rs 10,000 at 40% per annum compounded quarterly and annually?

If xy = 56 and x2+ y2= 113, then what will be the value of (x + y)?

3rd January 2018 was a Wednesday. Which of the following years will also have 3rd January on a Wednesday?

Which measurement unit represents volume?

The interest earned on Rs. 1600 at the rate of 5% S>I per annum for 6 yrs would be:

A, B and C start a business and the ratio of their investment is 8 : 5 : 3. If at the end the ratio of their profits is 4 : 15 : 6, then what is the ratio of time period of their investment?