Lines

1) Lines^**/*****
What code should go to the question marks?

You can check your solution here

New puzzles are published at least twice a month on Fridays. If you like this puzzle, do buy my book brimming with these puzzles!

Droodles

Did you ever notice that people often draw all kinds of figures during meetings? Here are some coded, abstract droodles.

There is a hint

Number squares

1) Number square^*
Find the missing number:

solution: Here)

Pattern code – arrows

Here are some arrows, all different, and all labelled.

What should be the label of the arrow in the center?

You can check your solution here

Optician

At the optician, I saw several spectacles for sale. The prices of the frames, still without the glasses, showed a very clear pattern.

What is the price of the one labelled with the question marks?

Usually you can find a new braintease here usually on Friday. Solutions are generally provided one week later.

You can check your solution here

What comes next?

Substitute digits for the question marks:

149 162 536 496 481 ???

This problem was posed before in the British magazine Games and Puzzles, issue 44, 1976, in a slight variation.

You can check your solution at here

Pattern codes – circles

1) Circles^**

Which code belongs at the question mark?
If you wish, you can peek at a hint

I have long suspected that there is a strong connection between mathematics and puzzles. Proving such a relation according to the scientific standards is of course another matter. It was nice to read that a study by the University of Chicago found that puzzle play helps boost Learning Math-Related skills in children between ages 2 and 4.

Masonry

The advertisement flyer of the contractor showed me several examples of masonry, with bricks in two colours: brown and yellow.

Which code should be substituted for the question marks?

You can look up a hint

Puzzlers are likely to value their brain power. So I’ll take this opportunity by passing on some research results: walking increases your memory

What comes next?

What comes next in the following sequence?

4 3 3 5 4 4 3 5 5 4 3 ..

If you think you found the solution, you can check the solution

Where does the zero go?

Where does the zero go in this sequence?

8 5 4 9 1 7 6 3 2

I would like to thank fellow consultant Harrie Jans for coming up with this little poser 🙂

If you solved it, we have the solution so you can check yours.