Open Middle®
Directions: Using the digits 1 to 9 at most one time each, place a digit in each box to create the largest (or smallest) sum possible.
Hint
Where should the largest numbers go?
Where should the smallest numbers go?
Where should the smallest numbers go?
Answer
Largest: 7×10^9+6×10^8
Smallest: 4×10^1+3×10^2
Smallest: 4×10^1+3×10^2
Source: Annie DeAngelo
I’m pretty sure the posted answer for the largest value is incorrect. It should be 8×10^9+6×10^7
V good indeed James