How can one talk without saying a single word?

An exterior architect is asked by a builder to plant seven trees in a manner that there are exactly six rows of trees in a straight line and each row has three trees in particular.

How will he do it?

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

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

Henry has been caught stealing cattle and is brought into town for justice. The judge is his ex-wife Gretchen, who wants to show him some sympathy, but the law calls for two shots to be taken at Henry from close range. To make things a little better for Henry, Gretchen tells him she will place two bullets into a six-chambered revolver in successive order. She will spin the chamber, close it, and take one shot. If Henry is still alive, she will then either take another shot, or spin the chamber again before shooting.

Henry is a bit incredulous that his ex-wife would carry out the punishment, and a bit sad that she was always such a rule follower. He steels himself as Gretchen loads the chambers, spins the revolver, and pulls the trigger. Whew! It was blank. Then Gretchen asks, 'Do you want me to pull the trigger again, or should I spin the chamber a second time before pulling the trigger?'

What should Henry choose?

How can you leave a room with two legs and return with six legs?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

If an electric train is travelling south, then which way is the smoke going?