The Palindromic Number
The odometer in the car showed
15951
miles,
a Palindromic number
. Two hours later the odometer showed the next palindromic number that comes after
15951
.
What is the average speed (in miles/hour) of the car for these two hours?
The answer is 55.
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1 solution
Notice the next Palindromic number on the odometer is 16061 miles.
Therefore the total miles travelled in the two hours are 16061 - 15951 = 110 miles
The average speed travelled is the distance over the time:
110 / 2 = 55 miles/hour