It’s larger than 40 but less than 50 and it has nine units what number is it?

3 answers

Check your spelling!
https://www.google.com/search?q=spell+41&oq=spell+41&aqs=chrome..69i57.2934j0j7&sourceid=chrome&ie=UTF-8

FORTY (not fourty!)
45?
9 units means the last digit is 9, right?