NumberWiz sum 850: Solution

Good morning NumberWizards! Here's a solution to yesterday's NumberWiz problem.

The problem was to add, subtract, multiply and divide 1 5 7 10 10 25 to get 850.


Solution: 850 is divisible by 25, so 25 might be in a solution. Divide 850 by 25 and get 34. How to make 34? 34 = 5 x 7 - 1. Done!

And here's the solution in total: 850 = (7 x 5 - 1) x 25