Choose a number between one and ten.
Multiply the number by two.
Add ten to the product of step 2. The product is the answer for a multiplication problem.
Divide the number by two.
Subtract the number that you started with by the answer to step 4. The answer will always be five.
Have a friend choose any number.
Tell them to double the number. Multiply by two to double the number.
Add 20 to the doubled number and divide by two.
Subtract the original number used from the answer in step 3. The resulting answer will always be ten.
Draw six different lines on a sheet of paper.
Tell a friend to make nine out of the six lines on the paper, but they have to strategically add five more lines.
Make sure they know it is possible after they give up by crossing one line between the top of the first line and bottom of the second line, making them touch. Skip the third line.
Draw another line from the top of line four to the bottom of line 5.
Draw three lines extending out to the right of the last line; one from the top, one from the middle and one from the bottom.The word NINE will appear from the six original lines.