IX+X=XXI So XXI is two legions into one.
I was going to make a pun about math, but my answers never add up
Why is sex like math? You add a bed, subtract the clothes, divide the legs, and pray there's no multiplying.
2 + 2 is 4, minus one that's 3 quick maths.
How did number 1 kindly make number 2? I got my ass kicked lets be friends ?
What is tuba plus tuba? -- Fourba.
