Which of the five black shapes is identical to the red one? There may be more than one which is exactly the same.

C and E are identical

Which of the six black shapes is identical to the red one? There may be more than one that is exactly the same.

Two people both eat exactly half of a chocolate bar and nothing else, but one person eats more than the other. How is that possible?

A man has 53 socks in his drawer. They are 21 identical blue, 15 identical black and 17 identical red. The light went off and he is in complete darkness. How many socks must he take out to be 100% certain that he has a pair of black socks?