Question

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toy train blocks made of 6 inches long or 7 inches long can be hooked together to make longer trains. which of the following train-lengths cannot be by hooking together either 6 inch tran cars, 7 inch cars, or a combination of both: 29 inches, 30 inches, 31 inches, 32 inches, 33 inches

Answers

  1. Answer:
    29
    Step-by-step explanation:
    6 or 7 inches
    29 can’t be
    30 can be 6*5
    31 (1*7)+(4*6)
    32 can be (2*7)+(6*3)
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  2. Answer:
    29 inches
    Step-by-step explanation:
    For the following I just used trial and error and experimented with the possibilities:
    29 inches – This is the only one that does not work.
    30 inches – We can use 5 of the 6 inch trains, so this is possible.
    31 inches – We can use 4 of the 6 inch trains and 1 of the 7 inch trains, so this is possible.
    32 inches – We can use 3 of the 6 inch trains and 2 of the 7 inch trains, so this is possible.
    33 inches – We can use 2 of the 6 inch trains and 3 of the 7 inch trains, so this is possible.

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