Please help me:

Convert each of the following from decimal form to the given base.

A) 65 to base seven
B) 2730 to base sixteen
C) covert CO2sixteen to base seven

Question

Please help me: 

Convert each of the following from decimal form to the given base. 

A) 65 to base seven
B) 2730 to base sixteen
C) covert CO2sixteen to base seven

anonymous · Answer

65 in base 7: $7^2=49$ so there is a $1$ in  the seven squared place
then $65-49=16$ and there are 2 $7$'s in 16, to there is a $2$ in the sevens place
then $16-14=2$ so there is a $2$ in the ones place
answer: $122$