Maths Quiz (Round 3)

[Desgracias]

hello again my friends     

Round 3 to my maths quiz is finally here, and it will be all about number bases and conversion. If you don't get what I mean in the questions, the number on the left will be the number in decimal and the number in brackets means what base the number will be converted to (for example if (12) is at the end, it means the number will be converted into dozenal, or base 12). Also, you don't have to do all of them at once, and try not to use the Argam Converter.

Good luck! 

1. 71 (12)
2. 21 (2)
3. 54 (16)
4. 195 (16)
5. 89 (12)
6. 110 (12)
7. 170 (12)
8. 79 (12)
9. 28 (3)
10. 91 (60)

From Uli, 11 years old. Thanks for reading.