Quantitative Aptitude - Arithmetic Ability Questions

In a class test, a student scored 22 marks out of 25 marks. The students marks in % is :

If sin θ + sin 5θ = sin 3θ and 0 < θ < (π/2), then what is the value of θ (in degrees)?

If x -­ y = 7 and xy = 32, then value of (x2 + y2) is

The simplest value of 38-212+20318-227+45 is

When a number is increased by 28, it becomes 107% of itself. What is the number?

The average weight of P, Q and R is 45 kg. If the average weight of P and Q be 36.5 kg and that of Q and R be 52 kg, then what is the weight (in kgs) of Q?

If the angle of elevation of the top of a pillar from the ground level is raised from 30° to 60°, the length of the shadow of a pillar of height 503 will be decreased by

In a class of 66 students there are 33 girls. The average weight of these girls is 61 Kg and average weight of the full class is 66 kgs. What is the average weight of the boys of the class?