You have a five-litres jug, a three-litres jug, and unlimited supply of water. How would you come up with exactly four litres of water (with no measuring cup)?
You fill the 5-litres jug, and pour it into the 3-litres jug until it's full (now you have 2 litres in the 5-litres jug). Then, you pour out the 3-litres jug completely. Now, you pour the 2 litres from the 5-litres jug into the 3-litres jug. Lastly, you fill the 5-litres jug and pour it into the remaining space of the 3-litres one (one more litre). Now you're left with 4 litres in the 5-litres jug.
DG
Related Maths A Level answers
All answers ▸Find the derivation of (sinx)(e^2x)
Given that y = 5x^4 + 3x^3 + 2x + 5, find dy/dx
Differentiate y=x^2cos(x)
At time t = 0, a particle is projected vertically upwards with speed u m s–1 from a point 10 m above the ground. At time T seconds, the particle hits the ground with speed 17.5 m s–1. Find the value of u and T and evaluate the model. (AS mechanics)