## anonymous one year ago You can throw an unlimited number of darts at the dartboard. Some total scores are impossible to obtain, such as all numbers less than 5 as well as 6, 8, and 9. What is the highest whole number score that is impossible to obtain?

1. anonymous

Here's the choices 31 18 23 29

2. anonymous

I think 23

3. calculusxy

Yes you're correct according to the Frobenius number of (a,b)

4. welshfella

I dont get this question

5. calculusxy

This is basically with the formula from Frobenius number of (a,b) $(a,b)$ is $(a \times b) - a - b$

6. calculusxy

Thus, if we have a = 5 and b = 7 we will get $(5 \times 7) - 5 - 7 = 35 - 5 - 7 =20 - 7 = 23$