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Robert has 12 coins totaling $1.45. None of his coins is larger than a quarter. Which of
the following cannot be the number of quarters he has?
The correct answer is 1 because
coin • number = total value.
When
p = the number of pennies,
n = the number
of nickels, d = the number
of dimes, q = the number
of quarters.
The total number of coins = p+ n+ d+ q = 12.
But if q = 1 then p+ n+ d = 11
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