Quantitative Aptitude - Arithmetic Ability Questions

The average marks of 40 students in an examination was 25. It was later found that the marks of one student had been wrongly entered as 73 instead of 37. What is the value of correct average?

Among three numbers, the first is twice the second and thrice the third. If the average of three numbers is 198, then what is the difference between the first and the third number?

The area of a rhombus having one side 10 cm and one diagonal 12 cm is

If x = at2 and y = 2at then

Δ DEF is right angled at E. If m∠D = 45°, then what is the value of cosecF X cotD?

If x2+y2+z2-8x+6y-4z+29 = 0, then find the value of z(x+y).

Curved surface area of a cylinder is 528 sq cm. If circumference of its base is 44 cm, find the height of the cylinder?

wooden bowl is in shape of a hollow hemisphere of internal radius 9 cm and thickness 1 cm. Find the total surface area of the bowl?