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# If a^2 - 10 < 1590, then how many integer values can a have?

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Retired Moderator
Joined: 27 May 2014
Posts: 525
GMAT 1: 730 Q49 V41
If a^2 - 10 < 1590, then how many integer values can a have?  [#permalink]

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27 Sep 2017, 05:55
00:00

Difficulty:

45% (medium)

Question Stats:

67% (00:33) correct 33% (00:25) wrong based on 12 sessions

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If a^2 - 10 < 1590, then how many integer values can a have?

(a) 78
(b) 79
(c) 80
(d) 81
(e) 101

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Senior Manager
Joined: 02 Jul 2017
Posts: 293
Concentration: Entrepreneurship, Technology
GMAT 1: 730 Q50 V38
Re: If a^2 - 10 < 1590, then how many integer values can a have?  [#permalink]

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27 Sep 2017, 06:06
If a^2 - 10 < 1590, then how many integer values can a have?

=> a^2 - 10 < 1590
=> a^2 < 10 + 1590
=> a^2 < 1600
=> -40 < a< 40

No. of integer terms a can have = 40-(-40) -1 = 79 ( we are subtracting 1 as both -40 and 40 are not included)

Math Expert
Joined: 02 Sep 2009
Posts: 50701
Re: If a^2 - 10 < 1590, then how many integer values can a have?  [#permalink]

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27 Sep 2017, 06:23
saswata4s wrote:
If a^2 - 10 < 1590, then how many integer values can a have?

(a) 78
(b) 79
(c) 80
(d) 81
(e) 101

You've posted this before: if-a-2-10-1590-then-how-many-integer-values-can-a-have-250226.html

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

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Re: If a^2 - 10 < 1590, then how many integer values can a have? &nbs [#permalink] 27 Sep 2017, 06:23
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