[HELP]

1. Two identical trains, at the equator start travelling round the
world in opposite directions. They start together. run at the same
speed and are on different tracks.Which train will wear out its wheel
treads first?



2. Next door to me live four brothers of different heights. Their
average height is 74 inches, and the difference in height amongst the
first three men is two inches. The difference between the third and the
fourth man is six inches. Can you tell how tall is each brother?



3. Fifty minutes ago if it was four times as many minutes past three o'clock. how many minutes is it to six o'clock?



4. while in San Francisco some time back, I hired a car to drive over
the Golden Gate bridge. I started in the afternoon when there was no
traffic rush. So J could drive at a speed of 40 miles an hour. While
0 returning. however. I got caught in the traffic rush and I
could only manage to drive at a speed of 25 miles an hour. What
was my average speed for the round trIp?



5. A family I know has several children. Each boy in this family has as
many sisters as brothers but each girl has tWice as many brothers as
sisters. How many brothers and sisters are there?