No, you must be at least 16 with parental permission to marry. A few places will allow younger with a court order.
In the US it is legal for an 18 year old to marry a 22 year old.
what will be the amount of sodium in 20 m3 of 0.5 M solution of Nacl?
Yes, you are both adults and it is perfectly fine for a guy to be with an older woman. Besides its only a 3 year difference, which is normal for today's society.
In most places they can. A very few require parental consent.
No not unless you are in the Philipines
No that is illegal.
An 18 year old girl can marry an 18 year old boy even if they are not in love in this state.
In most countries, no.
Of-course they can!
legally no that is basically robbing the cradle, if you know what that means, and why would you want to marry a 18 year old girl if your a 15 year old boy anyway?
No.
if they both have parents consent
With parental consent, yes.
No, both are adults and do as they wish.
Not if the live in Norway.
With parents permission but seriously too young
Yes, if the minor has parental consent.