s55: Thanks buddy :).
An astronomer, a physicist and a mathematician are on a train in Scotland. The astronomer looks out of the window, sees a black sheep standing in a field, and remarks, "How odd. Scottish sheep are black." "No, no, no!" says the physicist. "Only some Scottish sheep are black." The mathematician rolls his eyes at his companions' muddled thinking and says, "In Scotland, there is at least one sheep, at least one side of which looks black."
A visitor to the Royal Tyrrel Museum was admiring a Tyrannosaurus fossil, and asked a nearby museum employee how old it was. "That skeleton's sixty-five million and three years, two months and eighteen days old," the employee replied. "How can you know it that well?" she asked. "Well, when I started working here, I asked a scientist the exact same question, and he said it was sixty-five million years old – and that was three years, two months and eighteen days ago."
In the above example, the joke is that the employee fails to understand the scientist's implication of the uncertainty in the age of the fossil.
Tangential to mathematics is calculator spelling: words and phrases formed by entering a number and turning the calculator upside down. The words can be accompanied by stories involving numbers that lead to the solution. Such as: 142 workers and 154 civilians fought over 69 oil fields for 5 days. What did they fight over? (turn calculator upside down) 14215469 x 5 = 71077345, which is is read as "Shell Oil."