exam Maths Puzzle Numerical Ability

John and William leave their home traveling in opposite directions on a straight
road. John drives 20 miles per hour faster than William. After 4 hours they are
250 miles apart.

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exam Other Question

Ok this one I have no idea
z-8/z+5=4/7

Now do I need to use a LCd? Which I believe would be 35.
Know I think I am supposed to mult. 35 by both sides.
(35)z-8/z+5 and (35)4/7
Now is this ok so far?? Find two consecutive even integers such that the sum of the larger and twice the smaller is 62.