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# I am having trouble with Quant problems wherein the

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Intern
Joined: 14 Jul 2006
Posts: 48

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I am having trouble with Quant problems wherein the [#permalink]

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28 Dec 2006, 03:21
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

I am having trouble with Quant problems wherein the following type of calculations are required:

(2^30-2^29)+2^31 (Read as 2 raise to the power 30 and so on)

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SVP
Joined: 01 May 2006
Posts: 1794

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28 Dec 2006, 03:35
I don't know the result that u need to get ... But, I proceed like this

(2^30-2^29)+2^31
= 2^29*(2-1) + 2^31
= 2^29 + 2^31
= 2^29*(1+2^2)
= 5*2^29

Kudos [?]: 165 [0], given: 0

Intern
Joined: 14 Jul 2006
Posts: 48

Kudos [?]: 1 [0], given: 0

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28 Dec 2006, 03:52
Well, thats the right approach, I think so...

cuz d answer is right...So simple yet so unthinkable!

Kudos [?]: 1 [0], given: 0

SVP
Joined: 01 May 2006
Posts: 1794

Kudos [?]: 165 [0], given: 0

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28 Dec 2006, 04:20
bhalla.sumant wrote:
Well, thats the right approach, I think so...

cuz d answer is right...So simple yet so unthinkable!

Sometimes to simplify, we need to factorize first rather than expand the expressions

Kudos [?]: 165 [0], given: 0

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