#41

1) Choose and mark 6 of the following 24 boxes so that on each row and each column there are an even number of marks.
Answer:

There are several possible answers. If you know how many, please tell me. Here are some of the possibilities:

2) What figure comes next?
Answer:

Each figure is built from a number. The first is constructed using a 1 and the mirrored image of a one, pasted together. The same goes for the second figure which is a 2 and a 2 mirrored, pasted together. And so on. So the answer is a 6 with it's mirrored image, pasted together

3) Draw four straight lines through all nine points without lifting your pen and without retracing.
Answer:

4) Draw six straight lines through all sixtien points without lifting your pen and without retracing.
Answer: