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To go to sleep, Oliver counted by 6s starting from 15. Thus the first few numbers he named were
15, 21, 21, 33......
The last number he named before he fell asleep was 363. How many numbers did Oliver name?

 
SmartMathMan  Jan 9, 2018
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 #1
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58 numbers.  Subtract fifteen from 363 and divide the difference by six.

 
Guest Jan 9, 2018
 #2
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15   +  6n   =  363      subtract  15 from  both sides

 

6n  =  348                 divide both sides by 6

 

58 =  n     { plus  the first number, 15  } =      59 numbers

 

 

cool cool cool

 
CPhill  Jan 9, 2018

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