How many 4 digit numbers can be formed using digit 1, 3, 4, 6, 7 but it should be divisible by 3.

Question

Two cars, P and Q, start from a point X in India at 10 AM. Car P travels North with a speed of 25 km/h and car Q travels East with a speed of 30 km/h. Car P travels continuously but car Q stops for some time after traveling for one hour. If both cars are at the same distance from X at 11:30 AM, for how long (in minutes) did car Q stop?

Answer 1

The answer is 48.

How many 4 digit numbers can be formed using digit 1, 3, 4, 6, 7 but it should be divisible by 3.

Correct Answer: 48

Solution and Explanation

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