Cents no more

Janko bought pencils for 35 cents each. Neither he nor the salesperson had small coins just a whole € 1 coin. At least how many pencils had to buy to pay for the whole euros?

Correct result:

n =  20

Solution:

35=57 100=2252 LCM(35,100)=22527=700  n=LCM(35,100)/35=2035=5 \cdot 7 \ \\ 100=2^2 \cdot 5^2 \ \\ LCM(35, 100)=2^2 \cdot 5^2 \cdot 7=700 \ \\ \ \\ n=LCM(35,100)/35=20



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Showing 1 comment:
#
Moona
this question was really easy for me :)

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