Question

Write down the value of the green digit in each of these numbers
a.132.5 b.69.27 c.4.882 d 61.05

Answer 1

Step-by-step explanation:

Ask your mark to pick three (3) different numbers between 1 and 9.

Tell him or her (or her or him) to write the three numbers down next to each other, largest first and smallest last, to form a single 3-digit number. Tell him/her not to tell you what the numbers are.

Next have her or him form a new 3-digit number by reversing the digits, putting the smallest first and the largest last. And write this number right underneath the first number.

Now have him or her subtract the lower (and smaller) 3-digit number from the upper (and larger) 3-digit number. Tell them not to tell you what the result is.

Now you have a choice of wrap-ups:

Ask your friend to add up the three digits of the number that results from subtracting the smaller from the larger 3-digit number. Then amaze him or her by teling them what the sum of those three numbers is. The s