- Georgo2112April 2013
Here, as far as my knowledge goes-
" Many " is used for countable nouns..." Much " is used for uncountable ones...Years can be counted...so using ' Many ' is appropriate, I think ...How many years is he/your brother younger to you? How many years are you older than him/your brother?
I think "How much older are you" is correct, but you can also say "how many years older are you?"
"how old are you"
but when you want to compare
"how much (he/you) older than (you/him)"