Directions: Using the digits 1 to 9 at most one time each, fill in the boxes so that the product is as close to 50 as possible.

### Hint

What whole numbers would you multiply to make it as close to 50 as possible?

Closest is defined as the absolute value of the difference between the product and 50.

Closest is defined as the absolute value of the difference between the product and 50.

### Answer

The closest products found are 50.02 (6.1 x 8.2) from a student in Shannon Andrews‘ class as well as 49.98 (9.8 x 5.1) from a student in Lauren Giordano’s class.

Source: Robert Kaplinsky

A student found 9.8 x 5.1 = 49.98

Awesome! I updated the answer accordingly. Thanks for the heads up.

8.2*6.1

A quick Desmos graph to show some possible products.

https://www.desmos.com/calculator/ebumroskuv

That’s really cool, Rusty! Thanks for sharing that.

Hi Rusty, I modified your graph a little. Thanks for giving me the idea.

https://www.desmos.com/calculator/xlbdjd8l8b

What about 7*7=49?

Can only use each number once!

Is the problem as close to 50 without going over because I don’t see anything about that? If not, 8.2 x 6.1 is 50.02 and two hundredths away from 50 which is equal to 9.8 x 5.1 = 49.98 (distance wise).

Never mind, I just saw it was added to the answers and I must have missed that!

9.8 x 5.1=49.98 or 6.1 x 8.2=50.02

50.02