Quantitative Aptitude - Arithmetic Ability Questions

Working 7 hours in a day, 4 men can do a piece of work in 8 days. Working 8 hours in a day, the required number of men to perform the same work in 4 days will be

A man is 3 years older than his wife and four times as old as his son. If the son becomes 15 years old after 3 years. Then what is the present age of the wife?

An alloy is made by mixing metal A costing Rs 2000/kg and metal B costing Rs 400/kg in the ratio A:B = 3:1. What is the cost (in Rs) of 8 kilograms of this alloy?

Which of the following is correct?

If 31x + 31y = 403, then what is the average of x and y?

Three numbers are in the ratio of 3:5:10 and their LCM is 630. Find their HCF.

In the following questions two equations numbered I and II are given. You have to solve boththe equations and give answers

I. 2x ² –21x + 54 = 0

II. y ² –14y + 49 = 0

If secθ = cosecq with 0° < θ , q < 90°, then the value of sin (θ + q) is