What's the best place to go shopping in the ocean?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

When 99 is considered higher than 100?

On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, wives. How many were going to St. Ives?

I am the fastest animal but cannot climb the tree. What am I?

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

They are three errirs in this question. Can you find them?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135