Here’s a quicky, with thanks to my son in law Kevin:
No, the answer is not 6!
New puzzles are published at least once a month on Fridays. Solutions are published after one or more weeks. You are welcome to remark on the difficulty level of the puzzles, discuss alternate solutions, and so on. Puzzles are rated on a scale of 1 to 5 stars. You can check your solutions here.
This weeks quickie is inspired by a tweet by Laurie Rubel.
What’s next**/*****
14, 17, 23, 24, 26, 30, 33, …
A new puzzle is published at least twice a month on Friday. You can check your solution here.
In 1967 the Russian scientist M.M. Bongard published a book containing 100 problems. Each problem consists of 12 small boxes: six boxes on the left and six on the right. Each of the six boxes on the left conforms to a certain rule. Each box on the right contradicts this rule. Your task, of course, is to figure out the rule.
1)Bongard problem geometry 61****/*****
New puzzles are published at least once a month on Fridays. Solutions are published after one or more weeks. You are welcome to remark on the difficulty level of the puzzles, discuss alternate solutions, and so on. Puzzles are rated on a scale of 1 to 5 stars. You can check your solutions here.
While cleaning up old newspapers in someone’s house I came across a puzzle called “Quento” in the Dutch newspaper “Algemeen dagblad”.
The basics of this puzzle are simple calculations. What sets it a bit apart from other puzzles is that the answers are given, and that you have to find the exercise.
Example:
You have to find a calculation for each of the numbers on the right by going from a number to a + or – sign and on to another number. If necessary, you may add additional +/- signs and numbers, as long as you don’t use the same number or sign twice.
What you may do:
Not allowed is:
Of course there is a website, and an app for both Android and Ipad. Personally I think the exercises are too easy, though no doubt they can be increased by adding size and moving to higher numbers, as shown in our 4th problem. In the app I did see higher numbers, in the sense of multiples of 3, 4, 5 , and so on, but I didn’t see larger sizes, as in our fourth problem. That may be because I didn’t purchase the app and just used the free version.
Quento 2*/*****
Quento 3*/*****
Quento 4**/*****
You can check your solutions at href=”https://justpuzzles.wordpress.com/Solutions to puzzles 501-750/#516″>here.
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