Quantitative Aptitude - Arithmetic Ability Questions

A, B and C can complete a task together in 10 days. A and B would need 12 days if only the two of them worked, while B and C would take 20 days if only the two of them worked. If B worked alone, how many days would she take to complete the task?

If 8 men can do a piece of work in 14 days, then in how much time (in days) will 7 men do the same piece of work?

An object travels 24 m in 3 s and then another 15 m in 2 s. What is the average speed of the object?

Monika's father was 38 years of age when she was born while her mother was 36 years old when her brother four years younger to her was born. What is the difference between the ages of her parents?

The area of a rhombus is 24 m2 and the length of one of its diagonals is 8 m. The length of each side of the rhombus will be:

D and E are points on side AB and AC of ΔABC. DE is parallel to BC. If AD:DB = 2:3 and area of ΔABC is 100 sq cm, what is the area (in sq cm) of quadrilateral BDEC?

What is the slope of the line parallel to the line passing through the points (-­4,­-6) and (2,­-3)?

If 5x - 1 < 3x + 2 and 5x + 5 > 6 - 2x; then x can take which of the following values?