Logic Riddles

Question: Travel a mile and I will change.
Travel a million and I will end as I started.

What am I?

Question: If all of your surrounding is X, you can't Y. X n Y have the same letters. Name X n Y.

Question: How can you make 4 triangles with 6 equal sticks?

Question: I am there !!! but I was!!!

Question: I can climb incredibly high, but only drop so low, it all depends how fast the little ones go....