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ACT Math: Pre-Algebra Drill 5, Problem 2. If a and b are prime numbers, how many factors does ab have?
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If fleeing criminals always fled the scene of the crime at perfect right angles, it would be much easier to determine their whereabouts. Fortunatel...
SAT Math 3.4 Statistics and Probability 299 Views
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Description:
SAT Math 3.4 Statistics and Probability
Transcript
- 00:03
Here’s your shmoop du jour, brought to you by Positive Integers.
- 00:06
The integers that aren’t always griping about Mondays.
- 00:13
If a, b, and c are positive integers, and a is greater than b, which is greater than c…
- 00:20
…which ratio must be the smallest… of the answer choices provided?
- 00:24
And here are the potential answers…
Full Transcript
- 00:28
This problem can be solved in a number of ways,
- 00:30
but the easiest way is probably by elimination from the answer choices given.
- 00:34
Since we know that a is greater than b and b is greater than c,
- 00:38
we know that answer choices (A), (B), and (C) would all be larger than 1…
- 00:43
…since the larger numbers would all be on top of smaller numbers.
- 00:47
Option (D), on the other hand, is smaller than 1…
- 00:54
…so it's the smallest possible ratio… and the correct answer.
- 00:58
Our answer's D.
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