Get
two participants as Volunteers
Each
of them suggests a number, any number between 1 to 20.
The
third number is the sum of the first two numbers, the forth number will be the
sum of second & third number, so on and so forth,
The subsequence number will be the sum of the previous two numbers,
until you have all the 10 numbers
Now,
ask the volunteers to add up all the 10 numbers.
(
Someone
will be able to tell you the SUM well before they have completed the
calculation.
Why?)
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