Q10 Answer
XX
You have 10+HCPs and no fit, so you XX. This means that you have 10+ HCPs and no fit.
The alternative is to bid 2C.
Q20 Answer
3NT
Your partner has cue bid 3D, saying that they have HCPs, as you have stoppers in diamonds and >16 HCPs, bid 3NT.
Q30 Answer
