A girl was sitting in her hotel room when she heard a knock on the door. She opened the door and found that a man was standing outside. The man said, "Oh! I am really sorry, I thought this was my room." He then walked through the corridor to the elevator. The girl did not know the man. She closed her door and called security asking them to apprehend the man. What made her suspicious of that man? He might have been genuinely mistaken.

Different lights make me strange by changing me into different sizes. What am I?

What number should come in place of the question mark below?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

Identify the next two numbers in this series.

101, 112, 131, 415, 161, 718, ???, ???

I am written with two letters.
I said with the one.
I usually am seen with the two.

Who am I?

What building has the most stories?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Count the number of squares in the picture below.

There is a jar in which there are two types of candies.
20 blueberries and 16 strawberries. You perform the following steps:
1) You take out two candies.
2) If the two candies are of the same flavour, you add a blueberry one otherwise, you add the strawberry one.

You repeat these two steps till there is just one candy remaining in the jar. Which flavoured candy will be left?