Quantitative Aptitude - Arithmetic Ability Questions

Three balls ring at intervals of 15, 30 and 45minutes respectively. At what time will they ring together again, if they rang simultaneously at 8.00 AM?

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?

If 3:27 :: 5:?

Find the odd word/letters/number pair from the given alternatives.

In ΔDEF measure of angle E is 90 deg. If cotD = 8/15, and DE = 16cm, then what is the length (in cm) of side EF?

Find the circumference (in cm) of a circle of radius 17.5 cm.

If the cost price of 20 books is the same as selling price of 25 books, then the loss percentage is

A can do a work in 15 days and B in 20 days. If they work on it together for 6 days, then what fraction of work is left?