Quantitative Aptitude - Arithmetic Ability Questions

The average of ten numbers is 18. If one number is removed, then the average becomes 16, then what is the removed number?

If D and E are points on the sides AB and AC respectively of a triangle ABC such that DE||BC. If AD = x cm, DB = (x – 3) cm, AE = (x + 3) cm and EC= (x – 2) cm, then what is the value (in cm) of x?

In ΔABC, ∠B=90 deg and BC= √3 AB. Find the measurement of ∠A

What is the value of Cot 60°- Cos 45°?

ABC is an equilateral triangle and P is the orthocenter of the triangle, then what is the value (in degrees) of ∠BPC?

The mean of marks secured by 60 students in division A of class X is 64, 40 students of division B is 60 and that of 60 students of division C is 58. Find the mean of marks of the students of three divisions of Class X.

If x+5+1x+1=6 then the value of (x+1)3+1(x+1)3 is

X and Y are two alloys which are prepared by mixing zinc and aluminium in the ratio of 1 : 4 and 11 : 8 respectively. If equal quantities of alloys are melted to form a third alloy Z then what is the ratio of zinc and aluminium in alloy Z?