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?

What 5-letter word typed in all capital letters can be read the same upside down?

Can you make a six-letter word using the letters N, A and B ?

There are two beautiful yet remote islands in the South Pacific. The Islanders born on one island always tell the truth, and the Islanders from the other island always lie.
You are on one of the islands and meet three Islanders. You ask the first which island they are from in the most appropriate Polynesian tongue, and he indicates that the other two Islanders are from the same island. You ask the second Islander the same question, and he also indicates that the other two Islanders are from the same island.
Can you guess what the third Islander will answer to the same question?

Count the number of squares in the picture below.

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

You are driving down the road in your car on a wild, stormy night, when you pass by a bus stop and you see three people waiting for the bus

An old lady looks as if she is about to die.
An old friend who once saved your life.
The perfect partner you have been dreaming about.
Knowing that there can only be one passenger in your car, whom would you choose?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

What is harder to catch the faster you run?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?