Quantitative Aptitude - Arithmetic Ability Questions

The average weight of 30 students in a class is 25 kgs. If the weight of the class teacher is added, the average weight increase by 2 kgs. The weight of the class teacher in kgs is

Length of the sides of a triangle are a, b, c respectively. If a2 + b2 + c2 = ab +bc + ca then the triangle is

Of the 3 numbers whose average is 40, the first is 1/3 rd the sum of other 2. What is the first number?

Neeraj's earning was decreased by 60% and after that subsequently increased by 60%. Find the final loss % on his earnings?

The perimeter of two similar triangles ABC and PQR are 36 cms and 24 cms respectively. If PQ = 10 cm then the length of AB is

If a + b = 17 and a - b = 9 then the value of (4a2 + 4b2) is,

If r sinθ=3 and r cosθ=1, then the values of r and θ are: (0°⩽θ≤90°)

A thief is stopped by a policeman from a distance of 350 metres. When the policeman starts the chase, the thief also starts running. Assuming the speed of the thief as 7 km/h and that of police man as 12 km/h, how far the thief would have run, before he is over taken?