How to sign: 30

13 20 200 200 23 3 3 days 3 hours 3 months 3 o'clock 3 of us 3 weeks 300 300 31 32 33 34 35 36 37 38 39 3rd 3rd 40 400 400 50 50 500 500 60 60 600 70 700 800 900 count every 3 weeks fifty fifty triple zero