Improve your Mind

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IMPROVE YOUR MIND

On a long car journey why not improve your mind by dividing the car numbers by 9 using this remarkably easy method.

This follows on from the previous page because these sums may have multiple carry figures.

• 842 ÷ 9 = 8₁2 remainder 14 = 92 remainder 14
  
  Actually a remainder of 9 or more is not usually
  permitted because we are trying to find how
  many 9's there are in 842.
  
  Since the remainder, 14 has one more 9 with 5
  left over the final answer will be 93 remainder 5

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<p><img src="/images/Tutorials/FWF/Exercise.jpg" width="43" height="43" align="absmiddle"><span id="QHI_FWF_Improve_Your_Mind" class="QHC_TutorialButton">Improve Your Mind</span></p>

When he was twelve George Parker Bidder (1806-78) was asked "if a pendulum clock vibrates the distance of 9.75 inches in a second of time, how many inches will it vibrate in 7 years, 14 days, 2 hours, 1 minute, 56 seconds, each year being 365 days, 5 hours, 48 minutes, 55 seconds?"

George gave the answer, 2,165,625,744.75 inches, in less than 1 minute.