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The X.X1 at the end of the number implies that there could be 1, 11, 21, 31, etc. pennies. Now, we could go through and test the instances.

.01 means that there is 1 penny. Therefore, there are 2 dimes to make .31, which does not work.

.11 means that there are 11 pennies. Therefore, 22 dimes are required, which make $2.31. This works, so there are 22 dimes.

Q: How many dimes is in 2.31 if there are twice as many dimes as pennies?

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231 ÷ 7 = 33

231

231 inches = 19.25 feet.

21 of them because 231/11 = 21

"Between" there are 33. That is not including 231 and 265. If you include 231 and 265, there are 35.

Related questions

Assuming that pennies means cents (why?) then yes.

231 mm is 9.1 inches.

231 pounds = 104.779837 kilograms

It depends what is in the 231 quarts.

33 weeks in 231 days

231 miles is 371.76 kilometers.

231 pounds = 16.5 stone

231/36 = 6.416 yards

231 ÷ 7 = 33

231 inches = 19.25 feet.

231 ÷ 7 = 33

231