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THIS IS WHAT I CALL...
Dual Inversal Numbers
e.g. 1/2 = 0.5 1/5 = 0.2
OK... How about 4? 1/4 = /25 = 0.04 Pretty simple, eh? Watch out cos ‘ere they come – more of ‘em!
The Great... 1/27 = /37 = These lines mean recurring so =
1/7 = / =
Oh yeah... I forgot (drum roll please) 1/3 = is a ‘cannibal’ dual inversal.
NumberPairNumberPair * * 6* * *We’ll come back to these later!
*Interesting point no. 1 - It doesn’t work for everything They are all multiples of 3 but it does work for some e.g. 21 & 47619
Interesting point no. 2 If A & B and C & D are dual inversal pairs then AC & BD and AD & BC are dual inversal pairs.
1/4 = /25 = 0.04 Length = 2 1/27 = /37 = Length = 3 1/7 = / = Length = 6 1/17 = / = Length = 16 Interesting point no. 3 - length of the recurring sequence is always the same in a pair
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