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Micaiah places coins in the order of penny, nickel, dime, penny, nickel, dime, and so on, as shown, so that each row contains one more coin than the previous row. What is the total value in cents of all coins in the 12th row?

 

                         1

                5              10

         1              5            10

    1           5              10           1

5       10            1              5          10

 May 10, 2021
edited by Guest  May 10, 2021
edited by Guest  May 10, 2021
 #1
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Each row has the same number of coins in it as the row number

 

12th row has twelve coins   ....look at the patterns of the sides of the triangle

 

151     1 10 10

151 151 151 15    twelfth row starts with 1   has 12 coins   

                                                1 5 10    1 5 10    1 5 10    1 5 10       Add the red numbers for answer (16 * 4 = 64 cents)

 May 10, 2021
edited by ElectricPavlov  May 10, 2021

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