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The PCTM Puzzle of the Week - Solutions

After 6th spring= 640
After 10th spring=10240
After 20th spring=10485760
Nth= 20(2)^(n-1)
it's also 2^(n)and add a zero on the end ie) 2, 4, -> 20, 40...
and An-1*r (recursively)

X=number you start with
Y=the nth time

so doubled  it is

X(2^(Y-1))

if it tripled every year,
it would be

X(3^(Y-1))


-Da Russian Spy Demetri
and 
-Hans  






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