Quantitative Aptitude - Arithmetic Ability Questions

P and Q can do a project in 12 and 12 days respectively. In how many days can they complete 50% of the project if they work together?

Two numbers are in the ratio 2:5 and their HCF is 18. Their LCM is

The sum of two positive integers is 80 & difference between them is 20. Then what is difference of squares of those numbers ?

Determine the value of z in the equation: z = 20+20+20+20+...∞

If A, B and C can do a job working alone in 12, 18 and 36 days respectively. They all work together for 2 day, then B quits. How many days will A and C take to finish rest of the job?

P bought an article for Rs. 1600 and sold it at a profit of 10%. What would have been the increase in the profit percent if it was sold for Rs. 1840?

If (8x ­- 4) = (3x + 6), then the numerical value of (x + 1)3 is

A man travelled a distance of 50 km in 8 hours. He travelled partly on foot at 5 km/hr and partly on bicycle at 7 km/hr. What is the distance (in kms) travelled on foot?