John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

Why do people go to bed?

A thief enters a store and threatens the clerk, forcing her to open the safe. The clerk says, “The code for the safe is different every day, and if you hurt me you’ll never get the code.” But the thief manages to guess the code on his own. How did he do it?

A four-digit number (not beginning with 0) can be represented by ABCD. There is one number such that ABCD=A^B*C^D, where A^B means A raised to the B power. Can you find it?

There are 3 apples in the basket and you take away 2. How many apples do you have now?

Which tank will fill first?

I shave every day, but my beard stays the same. What am I?

P is the father of Q and S is the son of R. T is the brother of P and has a daughter U. If R is the sister of P, then what is the relation between U, Q and S?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??