Archive for the ‘brain-teasers’ Category

“Solve This If You Are A Genius”

September 11, 2015

Well, that was the headline on Facebook at any rate.

Don’t scroll down.  See how you get on.


The correct answer is 79.  That is, the last digit of the number before the equation becomes the first digit of the number after the equation.  Add two to it for the second digit.  116 was missed out just to confuse you.

I got 68.  I am not a genius,


Magic or maths?

June 25, 2015

This is an old puzzle re-done by a clever magician called Greg Rostami.  I have watched it three times now and I have NO IDEA how it works.  It’s not a trick (I don’t think) – that is, there’s nothing “secret” going on.  But it’s got me completely baffled.  (Best watched on full-screen).

How long to solve this puzzle?

June 23, 2015


What is the number in the space that the car is obscuring?

This was part of test at a Hong Kong elementary school.  The children were expected to solved it in 20 seconds.

It’s one of those puzzles that – apparently – children solve much quicker than adults.  Loads of smart-alecks on the web are boasting that they got it in under ten seconds.  It took me longer than that.  (But loads of my friends didn’t get it at all, heh he!)

The answer is in the post below.