<<This means that sometimes I will say numbers which are not there or miss numbers. >>
Considering that so much in aviation is to do with numbers, as an air traffic controller I would be somewhat concerned to know that a pilot I was dealing with might have difficulty in this respect. In a busy situation with heading and frequency changes it could be dangerous. I know the originator is interested in flying helicopters but I have dealt with such aircraft in emergencies and if the pilots had experienced "difficulty with numbers" the outcomes might have been different.