Answer:41
2. What number should replace the question mark?
Answer: Two. In each square the two numbers at the bottom are multiplied to give the two at the top.
3. A red car and a blue car set off from the same point,at the same time, to travel the same journey.
The red car travels at 50 mph and the blue car travels at 40mph. If the red car stops after 140 miles, how many minutes will it take the blue car to catch up?
Answer: 42 minutes
4. A 110 yard long train travelling at 30mph, enters a one and a half mile long tunnel. How long will elapse between the moment the front of the train enters the tunnel and the moment the end of the train clears the tunnel?
Answer: Three minutes and seven and a half seconds.
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