Number series

P28
The following digits are arranged in a particular order. You are required to find the basis for this order ?
8-5-4-9-1-7-6-3-2-0

Problem of ages

P 14    0567 Br Tsr 151007

A man is the same age as his wife with the digits reversed. One eleventh of the sum of their age equals the difference in their ages. How old are they, assuming the man is elder ?

Dog and rabbit

P12 0567 131007
There is a rectangular field with sides 80 and 60 metres. A dog at A spots a rabbit at B and starts chasing it at the same moment that the rabbit begins to run away. The rabbit runs at 20 kmph straight on to its burrow at the other end of the field at C. The dog knows he cannot catch the rabbit if he goes to B and then to C and takes a diagonal course keeping his quarry in sight and always running directly towards it. Since the dog’s speed is 25 kmph, at what point along BC will he catch the rabbit ?

( Fig Dog and Rabbit).