Quantitative Aptitude - Arithmetic Ability Questions

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

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

PQRS is a square whose side is 16 cm. What is the value of the side (in cm) of the largest regular octagon that can be cut from the given square?

Some carpenters promised to do a job in 15 days but 3 of them were absent and remaining did the job in 20 days. What was the original number of carpenters?

Three electronic devices make a beep after every 48 sec, 72 sec and 108 sec respectively. They beeped together at 10 a.m. The time when they will next make a beep together at the earliest is

Two trains start from a certain place on two parallel tracks in the same direction. The speed of the trains are 45 Km/hr and 40 Km/hr respectively. The distance between the two trains after 45 minutes will be

Junko sold an item for Rs. 220 at a loss of 12%. By how much should she have raised the price to make a profit of 10% ?

What number should be added to each of the numbers 55, 100, 65 and 116, so that the resulting numbers are in continued proportion?