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Common mistake

Believing a large amount takes longer to double

It sounds like this

“£1,000 can double quickly, but a million would take far longer to double.”

Why it’s wrong

The growth is a percentage of whatever is there, so a bigger amount grows by a bigger sum and doubles in exactly the same time.

The lesson that fixes it

Cognosc spots mistakes like this.

When you explain something in your own words, Cognosc can tell exactly which mistake you’re making — not just that you’re wrong — and gives you a short lesson to fix that one thing.