BTGModeratorVI wrote: ↑Wed Mar 25, 2020 6:30 am
If a and b are positive integers such that a/b = 82.024, which of the following can be the value of b?
(A) 100
(B) 150
(C) 200
(D) 250
(E) 550
Answer:
D
Source: Veritas Prep
Notice that we can rewrite 82.024 as 82 + 24/1000
So, 82.024 = 82 + 24/1000
Simplify to get: 82.024 = 82 + 3/125
Rewritten as an ENTIRE fraction, we get: 82.024 = [(82)(125) + 3]/125
a/b = [(82)(125) + 3]/125, so b COULD equal 125.
When we check the answer choices, we don't see 125.
That's okay, because we can rewrite [(82)(125) + 3]/125 as an EQUIVALENT fraction, just like we can rewrite 3/7 as 6/14 or 9/21 or 12/28 etc.
Likewise, if we rewrite [(82)(125) + 3]/125 as an EQUIVALENT fraction, the denominator (b) can be ANY MULTIPLE of 125
Checking the answer choices, only 250 is a multiple of 125
Answer: D
Cheers,
Brent
