A sundial has the fewest moving parts of any timepiece. Which has the most?

In an Art Gallary, When the clock hit 11 am, Artist hung the painting number 30. When it struck 4 pm, he hung painting number 240 and when it struck 7:30 pm, he hung painting number 315.

Can you determine, which painting number will he hang when the time is 9:20 pm?

You walk into a room and see a bed. On the bed, there are two dogs, five cats, a giraffe, six cows, and a goose. There are also three doves flying above the bed. How many legs are on the floor?

What is common among 11, 69, and 88?

Can you name some countries which do not have the alphabet 'A' in them?

I look at you, you look at me, I raise my right, you raise your left. What am I?

Find the next number in the series below

21 32 54 87 131 ?

What has 13 hearts but no other organs?

A man lives on the fifteenth floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator, and, if there is someone else in the elevator, or if it was raining that day, he goes back to his floor directly. Otherwise, he goes to the tenth floor and walks up five flights of stairs to his apartment. Can you explain why he does this?

Can you solve below mathematical equation?

2^1234 - 2^1233