A: what's “pi”? B: that's the ratio of the circumference of a circle to its diameter, I think. A; I see. What is that ratio exactly? B: it's approximately 3.14, but the number continues forever. What's the diameter of your circle? A: it's 10 centimeters, so the circumference should be 31.4 centimeters. B; ok. My next problem is to convert 10000 british pounds into us dollars. What's the exchange rate at the moment? A: according to the newspaper, the exchange rate is 1.85 dollars to the pound. B: that means that 10.000 pounds will buy me 18.500 dollars. A: what's the next question. B; fractions. What's a quarter and an eighth? That's three-eights. Easy. The next question is “what are prime numbers?”. A: I can help you there. Those are numbers that cannot be created by multiplying two whole numbers, apart from the number itself and 1, together. B; so, 1,2 and 3 are prime numbers, but 4 isn't because 2*2=4. A: exactly. Anything else? B; how many seconds in an hour? 60 seconds multiplied by 60 minutes equals 3600 seconds altogether. A: you'll be a mathematician one day.
