Quantitative Aptitude - Arithmetic Ability Questions

A does 1/2 as much work as B and C does1/2as much work as A and B together. If C alone can finish the work in 40 days, then together all will finish the work in

Between 50 and 150 how many numbers are divisible by 7?

Smaller diagonal of a rhombus is equal to length of its sides. If length of each side is 4 cm, then what is the area (in cm2) of an equilateral triangle with side equal to the bigger diagonal of the rhombus?

What is the value of (cos 40° – cos 140°)/(sin 80° + sin 20°)?

At 30% discount the selling price of an article is Rs 1050. What is the selling price (in Rs) if the discount is 15%?

In the following question, select the odd number pair from the given alternatives.

An equilateral triangle ABC is inscribed in a circle of radius 20√3.
What is the length of the side of the triangle?

Roshan's current age is three years less than 1.5 times that of Usha's. 12 years ago Usha's age was three years more than half of Roshan's age. What is Roshan's present age in