Quantitative Aptitude - Arithmetic Ability Questions

In ∆DEF measure of angle E is 90°. If secD = 25/7, and DE = 1.4cm, then what is the length (in cm) of side DF?

If x = cosecθ - sinθ and y = secθ - cosθ, then the relation between x and y is

If x + [1/(x + 7)] = 0, then what is the value of x – [1/(x + 7)]?

For the data given below. find the sum of mode. median and mean.6, 3, 8, 4, 3, 11, 7, 4, 5, 4.

The mean of 12 observations is 15. One more observation is included and the new mean becomes 16. The 13th observation is

An hour-long test has 60 problems. If a student completes 30 problems in 25 minutes, then the required seconds he has taken on average for computing each of the remaining problems is

At an average of 80 km/hr Shatabdi Express reaches Ranchi from Kolkata in 7 hrs. Then the distance between Kolkata and Ranchi is

In a triangle PQR, the side QR is extended to S. ∠QPR = 72° and ∠PRS = 110°, then the value of ∠PQR is