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# Picking numbers, which are the best to choose

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Intern
Joined: 22 Mar 2017
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Picking numbers, which are the best to choose  [#permalink]

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04 Nov 2017, 04:58
If encounter a question where I need to choose numbers, which numbers should I choose?
Are there numbers which are most suitable?
I have learnt that 0 is that good number to choose from a Kaplan video session.
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Joined: 02 Sep 2009
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Re: Picking numbers, which are the best to choose  [#permalink]

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04 Nov 2017, 09:14
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Re: Picking numbers, which are the best to choose  [#permalink]

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08 Nov 2017, 12:17
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very_nice wrote:
If encounter a question where I need to choose numbers, which numbers should I choose?
Are there numbers which are most suitable?
I have learnt that 0 is that good number to choose from a Kaplan video session.

In general, choose whichever numbers seem like they'll make the math easiest. Those numbers will typically be small(ish), round, and sometimes they'll be multiples of other numbers in the problem.

In even/odd problems in particular, try 0 and 1.

In positive/negative problems, try 1 and -1.

In percent problems, try 100.

In ratio problems, try the numbers in the ratios you're given. For instance, if the ratio of boys to girls is 10 to 3, start out with 10 boys and 3 girls. Or, use an easy multiple of those numbers, like 100 boys and 30 girls.

If you begin choosing numbers and the math doesn't seem to be working out correctly, you have a choice to make: do you keep working, using the not-so-good numbers? Or do you back up and pick easier numbers instead? That depends on how comfortable you are with doing pen-and-paper arithmetic. Even if the numbers start to look weird, you may be able to finish the problem anyways.
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Re: Picking numbers, which are the best to choose  [#permalink]

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11 Nov 2017, 17:34
very_nice wrote:
If encounter a question where I need to choose numbers, which numbers should I choose?
Are there numbers which are most suitable?
I have learnt that 0 is that good number to choose from a Kaplan video session.

Suppose there are two numbers such as 10 and 15 given in the question.
Then options which are obtained by simple addition or subtraction of numbers are usually wrong and can be eliminated. So options containing 25 and 5 would be wrong in this case.
Needless to say that we should use these techniques when we have no idea how to solve a question or just have few seconds left in the clock.
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Re: Picking numbers, which are the best to choose  [#permalink]

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25 Jan 2019, 14:52
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Picking numbers, which are the best to choose   [#permalink] 25 Jan 2019, 14:52
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