What has a ring but no finger?

The Puzzle: A girl, a boy, and a dog start walking down a road.

They start at the same time, from the same point, in the same direction.

The boy walks at 5 km/h, the girl at 6 km/h.

The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.
How far does the dog travel in 1 hour?

Find the number of squares in the below-given picture.

Can you write down eight eights so that they add up to one thousand?

What seven-letter word has hundreds of letters in it?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

How many letters are in the alphabet?

When a clock is observed, the hour hand is at a minute mark and the minutes hand is six minutes ahead of it.

When the clock is observed again after some time, the hour hand is precisely on a different minute mark and the minute hand is seven minutes ahead of it.

Can you calculate how much time has elapsed between the two observations?

Which point will the car reach to go out?