Quantitative Aptitude - Arithmetic Ability Questions

The average marks of 56 students is shown as 60. It includes a wrong entry of 92 marks instead of 29 marks. The correct average is _____ .

A man travels 50 km at speed 25 km/h and next 40 km at 20 km/h and there after travel 90km at 15 km/h. His average speed is

Find the unit place digit in 71 x 72 x 73 x 74 x 76 x 77 x 78 x 79.

Circum center of ΔABC is O. If ∡BAC = 75 and ∡BCA = 80 degrees,

then what is the value of ∡OAC(in deg)?

The mean of 20 observations is 19. One more observation is included and the new mean becomes 20. The 21st observation is

The value of x13+x-13x23-1+x-23

What will be the net discount percentage of three successive discounts of 20%, 10% and 30%?

Triangle PQR is inscribed in the circle whose radius is 14 cm. If PQ is the diameter of the circle and PR = 10 cm, then what is the area of the triangle PQR?