How many times can you subtract the number two from the number fifty?

What word begins and ends with an E, but has only one letter?

If you say my name, I will no longer exist. What am I?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.

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?

What has one letter and starts with an E?