12-1, that is, 11.
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The possible biggest remainder when dividing any number by 12 is 11. This is because when dividing any number by 12, the remainder can range from 0 to 11, with 11 being the largest possible remainder. This is because after dividing by 12, the remainder can never exceed 11, as it would then be the same as or larger than the divisor, which is 12.
The GCF is 12.
13.25
No. The remainder after any division must be less than the divisor: it can be any of the numbers 0 to the divisor less 1. For three: 3 - 1 = 2, so the possible remainders are: 0, 1, 2 Division is the opposite of multiplication in that it tells you how many times the divisor can be subtracted from the dividend to get to 0 without going past 0; if there is a remainder, it tells you that you that a fraction of the divisor needs to be subtracted to get to 0. eg 12 ÷ 3 = 4 says that you can subtract 3 from 12 four times and you will get 0: 12 - 3 (once) = 9, 9 - 3 (twice) = 6, 6 - 3 (three times) = 3, 3 - 3 = 0 (four times). eg 11 ÷ 3 = 3 remainder 2 says that you can subtract 3 from 11 three times but if you subtract it four times you will go past 0: 11 - 3 (once) = 8, 8 - 3 (twice) = 5, 5 - 3 (three times) = 2; but 2 - 3 = -1 which is past zero, so there is a remainder of 2 which requires a fraction, in this case two thirds of 3, to get to (exactly) zero: 2 - 2/3 x 3 = 2 - 2 = 0. If you have a remainder larger than the divisor, you can subtract the divisor again and still not reach 0 (as in the "once", "twice" and "three times" of the examples above).
The divisor is 3 because 12/3 = 4