Quantitative Aptitude - Arithmetic Ability Questions

Find the range of the data : 11,13, 9, 17, 13, 19, 10, 11

If 20 men working 8 hours per day can complete a piece of work in 21 days. How many hours per day must 48 men work to complete the same job in 7 days?

What is the value of (4/3) cot2 (p/6) + 3 cos2 (150) – 4 cosec2 45 + 8 sin (p/2)?

What is the value of (3/5 + 7/9)?

The value of cos (1110°) is

Two students appeared for an examination. One of them secured 16 marks more than the other and his marks were 75% of the sum of their marks. The marks obtained by them are

If the Arithmetic mean of 7, 5, 13, x and 9 is 10, then the value of x is

What is the third proportional to 10 and 20?