Press the <Start> button to weigh the first five Gregs. One of the Gregs will drop on the scale, waiting to be weighed. You can weigh Greg by moving the larger and smaller weights to the right or left on the graduated bar. The bottom (larger) weight shows units and the top(smaller) weight shows hundredths of a gram. Move the weights until the bar is level. The red pointer on the right should be on the center mark when you arrive at Greg's weight. There is a small Assist window that will tell you if you have to go higher (to the right) or lower (to the left).

When you arrive at Greg's weight a plunger will gently push him off the scale. The next Greg will drop, waiting to be weighed. After the first Greg is weighed, a second Greg will drop onto the scale and you will weigh him in the usual manner. After he is weighed, he will be pushed off the scale, but this time you will be asked to add his weight to the Greg(s) already weighed. Continue weighing and adding the Gregs until all five Gregs are weighed. You will then have a chance to weigh more Gregs by pressing the <Start> button or you can press the <Report button> that will give you a printable rank card that shows your time.

You will be given instructions under "Messages" to help you run the program.

The program will keep track of subtotals as you work along.

See how long it takes to weigh five Gregs.

A challenge - See if you can add the weights mentally,