Identify the 10 differences between the two given pictures.

What has 13 hearts but no other organs?

When a clock is observed, the hour hand is at a minute mark and the minutes hand is six minutes ahead of it.

When the clock is observed again after some time, the hour hand is precisely on a different minute mark and the minute hand is seven minutes ahead of it.

Can you calculate how much time has elapsed between the two observations?

All of Jacob's shoes are red except two.
All of Jacob's shoes are green except two.
All of Jacob's shoes are yellow except two.

How many shoes does Jacob have?

What does a man do only once in his lifetime, but women do once a year after they are 29?

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?

If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

Why do we preferably have round manhole covers and not square ones?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?