How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM

PS: You may start the number from 0.

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

The following "Brain Bat" means Slow Down.
S
L
O
W

Using the same logic, can you tell us what does the following Brain Bat means ?
E
V
I
G

10 people came into a hotel with 9 rooms and each guest wanted his own room. The bellboy solved this problem.
He asked the tenth guest to wait for a little with the first guest in room number 1. So in the first room, there were two people. The bellboy took the third guest to room number 2, the fourth to number 3, ..., and the ninth guest to room number 8. Then he returned to room number 1 and took the tenth guest to room number 9, still vacant.
How can everybody have his own room?

Count the number of triangles in the given picture.

What is the fastest way to double your money?

What does below Rebus mean ?

esgg sgeg gegs gsge

How can you drop a raw egg from a height onto a concrete floor without cracking it?

O_er_t_o_

Complete the missing letters of the given word.