Common word problem types
Most textbook word problems follow one of a few patterns:
- Distance, rate and time: distance = rate × time.
- Percent change: new = old × (1 + r), or old × (1 - r) for a decrease.
- Working together: 1/a + 1/b = 1/t for two workers who take a and b hours alone.
- Mixtures: amount × concentration adds up across the parts.
- Simple interest: I = P × r × t.
- Consecutive integers: n, n + 1, n + 2.





