What are the highest and lowest numbers that can possibly be scored? 9 ? 3 ? 4 ? 7 ? 5 =

Question

Working from left to right, calculate the numbers in the order shown (without using order of operation).

Replace each question mark with a mathematical sign. Plus, minus, multiply and divide can each be used once only.

What are the highest and lowest numbers that can possibly be scored?

9 ? 3 ? 4 ? 7 ? 5 =

Answer 1

lowest number
9-3+4=10//////////////////10*7/5=14
highest number
9/3+4=7*7-5=44

Answer 2

The permutation of 4 elements gives us 24 combinations
I worked all 24 combinations
Lowest number is given by
9 + 3 / 4 - 7 x 5 = - 20
Highest number is given by
9 / 3 + 4 x 7 - 5 = 44