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Sequence A is a geometric sequence. Sequence B is an arithmetic sequence. Each sequence stops as soon as one of its terms is greater than 300. What is the least positive difference between a number selected from sequence A and a number selected from sequence B? 

 

Sequence A: 3, 6, 12, 24, 48, ...

 

Sequence B: 20, 40, 60, 80, 100, ...

 Dec 26, 2020
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Sequence  A  = 3,6,12,24,48,96,192,384

 

Sequence B  =  20,40,60,80,100,120,140,160,180,200,220,240,260,280, 300,320

 

100 - 96   = 4  (or  24 - 20    = 4)

 

 

 

cool cool cool

 Dec 26, 2020

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