"It is easier to square the circle than to get round a mathematician." Augustus De Morgan
"A mathematical truth is neither simple nor complicated in itself, it is." Emile Lemoine
"Every new body of discovery is mathematical in form, because there is no other guidance we can have." C. G. Darwin
Pick A Number
Add 5 to this number. Now subtract 2. Now add 10. Now subtract 3. Now subtract the number you started with. Now divide by 2. The result is 5.