|
|
 |
By using Ballpark, you find an answer by what could reasonably be in the range of the answer or reasonably within the scope of the question.
Try the Ballpark Strategy here:
If 0.303z = 2,727, then z =
a) 9,000
b) 900
c) 90
d) 9
e) 0.9
| Solution
(A) Because the answer choices are so far apart, you
can ballpark this problem. Think about it: .303
is close to 1/3. 1/3 of z = 2,727, then what
answer could possibly be correct? You don't
even have to do the math. 2,727 is about 1/3
of 9,000; therefore, the answer must be 9,000,
according to the Ballpark Strategy (note
that there are no other answers even in the
9,000 range). Or, you could multiply
both sides by 1000 to eliminate the decimal
points, then divide 2,727,000 by 303 and get
the same answer.
|
|
|
Why use Ballpark?
1)To double check yourself. Does the answer look reasonable?
2) It is quicker than doing the calculations. Sometimes you can ballpark and jump straight to the right answer choice or tell if a statement is sufficient on Data Sufficiency.
3) This is a particularly useful strategy when the possible answers are scattered
This is a partial free sample of our prep guide. To view this complete page, purchase the 800score.com Prep Course.
|
|
