Q- If someone gives blood for a test while fasting, would this break the fast?
A- Giving blood does not invalidate the fast..
Q- Are we are allowed to use flavoured miswaaks in Ramadan as long as we dont swallow it?
A- The use of flavoured Miswaak is Makrooh, whether it is swallowed or not. If the flavour is swallowed the fast will be nullified.
Q- If one bites his or her nails whilst fasting, does it break it?
A- Biting the nails in itself does not break the fast, however swallowing them would break the fast