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The number $1102$ in base $3$ is equivalent to $123$ in which base system?

1. $4$
2. $5$
3. $6$
4. $8$
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(1102)3=1⨉33+1⨉32+2=38

(123)x=1⨉x2+2x+3

Now, 1⨉x2+2x+3=38

x=5

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