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look like its very interestingSecrets of Mental Math
Description:
Quick: What's 25 ร 45? How about 742 ร 300? Or 4821 รท 9?
Most of us, when faced with math problems like these, immediately reach for a calculator or a pen. But imagine if you could perform these and other seemingly difficultโbut surprisingly easyโcalculations right in your head. Seems like an impossible feat? It's not.

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