Quantitative Aptitude - Arithmetic Ability Questions

Find the mean and mode of the numbers 1, 9, 5, 4, 2, 1, 9, 9, 2, 1, 9, 1, 2, 1?

Which of the following numbers is composite?

The average of three numbers is 6. The average of the first two is 5 while the average of the last two is 8. The three numbers are:

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

A cylinder of radius 4.5 cm and height 12 cm just fits in another cylinder completely with their axis perpendicular. What is the radius (in cm) of second cylinder?

If 5(4 - x) - 4 > 5x -2 > 2x - 6, then the value of x is

What is the value of sin (–π/3) + cos(–π/6)?

The 3rd and 8th term of an arithmetic progression are -14 and 1 respectively. What is the 11th term?