Rangku Alu

By Phuc Huynh on AppTrack Ninja.

Count the Beat

The bamboo poles clap shut on a beat. Your job is to work out which beats they stay OPEN, tap every one of them, and jump. That is multiples, wearing bamboo. If the poles shut every 3rd beat, the safe ones are the beats that are not multiples of 3. Add a second pair on its own cycle and the safe beats become the ones that are multiples of neither — common multiples, discovered rather than recited. Nothing here is graded on reaction speed. You choose your beats first, then watch it play out, so a slower child is never at a disadvantage and two players are always judged on the same arithmetic. …

Categories: Education

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