Dear to whom it may concern,
Is it correct that we use number 3 /6 instead of three and six in this sentence?
[color=red]No, let’s do this. Five more pounds of sardines, and double the amount of avocado dip, from three bowls to six.
With the best regard
Mitra584
It really depends on where you are writing it and what you are writing it for, Mitra.
In a formal piece of work, such as an essay, low numbers would be expected to be written as words.
In a recipe or similar structure, numbers would be more appropriate.
Informally, you could use either.