If a : b = 3 : 5 and a : c = 5 : 7, what is the value of b : c?

If 3 is added to both the numerator & the denominator of a fraction, it becomes 5/7. If 9 is subtracted from b...

If 25% of 220 equals 5.5% of w, then what is w?

In a certain village, m liters of water are required per household per month. At this rate if there are n hous...

If 4x larger than the sum x & 3y by 9, then x is larger than y by how much?

Experts say that 25% of all serious bicycle accidents involve head injuries and of all such head injuries, 80%...

Brighto soap powder is packed in cubeshaped cartons. A carton measures 10 cm on each side. The company has dec...