2) The odometer of a bicycle reads $3733 \mathrm{~km}$. The first time it will again display a number with three equal digits will occur

$\begin{array}{llll}\text { (A) before } 50 \mathrm{~km} & \text { (B) between } 50 \mathrm{~km} \text { and } 100 \mathrm{~km} & \text { (C) between } 100 \mathrm{~km} \text { and } 500 \mathrm{~km}\end{array}$ (D) between $500 \mathrm{~km}$ and $1000 \mathrm{~km}$ (E) between $1000 \mathrm{~km}$ and $5000 \mathrm{~km}$.
2) The answer is $(\mathrm{A})$

The first event will occur at km 3777. There are no intermediate events, because as long as the first two digits of the odometer are 3 and 7, the only possibility is that the other two are both equal to 3 or both equal to 7.