Mymensingh higher secondary 2013#1

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samiul_samin
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Mymensingh higher secondary 2013#1

Unread post by samiul_samin » Mon Feb 18, 2019 12:31 am

The sum of the age of Nonte and Fonte is $25$ and the sum of the age of Nut and Boltu is $40$ . If Nut is at least $2$ years elder than Nonte then Boltu is at least how many years elder then Fonte?

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samiul_samin
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Re: Mymensingh higher secondary 2013#1

Unread post by samiul_samin » Mon Feb 18, 2019 8:59 am

Hint
Easy algebra
Answer
$22$

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SA'AD
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Re: Mymensingh higher secondary 2013#1

Unread post by SA'AD » Wed Apr 10, 2019 11:24 am

samiul_samin wrote:
Mon Feb 18, 2019 8:59 am
Hint
Easy algebra
Answer
$22$
How can this be 22? I think this should be 13!
Cuz..
If nonte+fonte=25
or, nonte=25-fonte.........................(1)
and nut+boltu=40...........................(2)
Here, nut=nonte+2 [at least]
So, So, equation 2 stands,
nut+boltu=40
or, nonte+2+boltu=40
or, 25-fonte+2+boltu=40
or, boltu=fonte+13
Which means boltu has to be older than fonte by 13 years..
Correct me if I am wrong!
Be a good person but don't waste time to prove it..

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