If the specified time is within half an hour, you can use "minutes+posts+hours": 6:10 tempestsix 4: 20 Twenty Pastefur10: 25 Twenty Five Pasteten.
If the specified time exceeds half an hour, you can use "(different) minutes+to+(next) hours":10: 35 twenty-fivetoleven.
If the specified time is exactly half an hour, you can use "half+past+hour": 1 1: 30 and a half. One-stop study abroad strategy in ing.com