The Best Aplusclick Puzzle 2020
January 5, 2021 Leave a comment
Here they go
Secret Agent 007
February 16, 2020 Leave a comment
Seven secret agents are on payroll of a government.
Secret agent 001 spies on a secret agent who spies on secret agent 002,
who spies on a secret agent who spies on secret agent 003,
who spies on . . . spies on secret agent 007
who spies on a secret agent who spies on secret agent 001.
Who spies on secret agent 007?
18 Best Aplusclick Puzzles of 2018
December 1, 2018 Leave a comment
New challenges:
What is the easiest way to make it correct? Answer
In what Olympic sport does the winner cross the line facing backwards? Answer
What time is it? Answer
What is the necessary mirror size? Answer
Find all 18 best puzzles at
Markov Chain in Every Day Life
August 5, 2018 Leave a comment
The picture shows a subway map. A team of inspectors verifies passengers’ tickets at a station on a line, or all lines through it if there are many lines. Then they randomly choose the next neighboring station and move there to make their inspection.
Subway map
How many times higher is the probability of being inspected at station C than at station A?
Are you eager to know the answer? Try yourself before reading how Markov Chain helps to solve the problem. The answer is here.
The perfect explanation is given in the PBS Infinite Series video:
17 Best Puzzles of 2017
January 1, 2018 Leave a comment
Aplusclcik team chose 17 Best Puzzles of 2017.
They are:
What country has the lowest birth rate in the World?
If certain words in this question are spelt wrong, how many of the eighteen words are spelt wrong?
A claustrophobic gentleman chooses his place in the train that will enter a tunnel just after the station. Where is the best place for him?
Read more at
APLUSCLICK.ORG is online
July 10, 2017 Leave a comment
To respond to growing demand of international users, we redirect http://www.aplusclick.com to the new free website www.aplusclick.org . All links for extension .com are the same for extention .org Now the site is hosted in Switzerland. Please update your links. Happy challenges at www.aplusclick.org
Mystic Number 7
May 7, 2017 Leave a comment
Why we frequently use number 7?
Why there are seven days of week? seven deadly sins? seven wonders? . . . .
Look for the answer in the night sky or at aplusclick.org
Everyday Brain Training
October 1, 2016 Leave a comment
Millions people do everyday physical training / exercises. They want to keep their body in good shape.
Why a smaller number of people intentionally do everyday brain training / exercises?
- The absence of intelligence is not so visible as defaults of the physical shape.
- Everybody thinks that he / she is enough smart.
- Playing computer games is considered as a mental work.
- No time, there are other priorities.
- Lack of motivation / self-discipline.
- There are not interesting intellectual challenges to meet everyday.
- . . .
Many types of work, games, discussions concentrate on a limited types of challenges. You can play many hours everyday, but the types of exercises are limited: just kill / catch somebody, and you do it again and again.
Aplusclick tries to respond to the challenges by creating a collection of different logic puzzles for all ages. There are several thousands different types of problems. Enough to do everyday training for many months. Many of them demands exceptional intelligence.
Do your everyday 5-minute brain training at the free website Aplusclick and keep your brain sharp.
