First day of college: "prove that 0 times x is equal to 0". That got rid of everyone who wasn't really into maths :-)
That exercise was literally the first question, on the first hour of back to school, after 5 minutes of a welcome speech.
I can't even figure out the proof anymore, although it really can't be complicated given the ridiculously small amount of tools you are given (basically x + -x is 0, and (a+b) times c equals a times c + b times c. You are given nothing else.
That exercise was literally the first question, on the first hour of back to school, after 5 minutes of a welcome speech.
I can't even figure out the proof anymore, although it really can't be complicated given the ridiculously small amount of tools you are given (basically x + -x is 0, and (a+b) times c equals a times c + b times c. You are given nothing else.