Here’s a quick test…
Let’s say I offer you this sequence of numbers – 2-4-6 – and ask you to figure out the rule that I used to create it. All you need to do is suggest some more number sequences to see if they fit my rule. I’ll tell you if they do or they don’t.
What might spring to mind – and studies show that it often does – is an obvious answer like 8-10-12. That does fit the rule, but what’s the rule? It seems a sure thing that the rule is something like adding 2 each time, but it isn’t.
You might now be tempted to make various other guesses at upward sequences of numbers trying to figure out what this damn rule actually is.
A much less obvious answer would be something like 5-3-1. It’s almost inevitable that this sequence would never work and so it’s utterly pointless suggesting it. Indeed, it doesn’t fit the rule – but that’s a big clue to the answer.
My rule is is that the sequence is just made up of ascending numbers, whether it’s 1-2-3, 2-4-6 or 57-65-133 – any upward sequence will do.
This test was created in the 1960s by a British…