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# DS Sum of digits problem..

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VP
Joined: 02 Jun 2006
Posts: 1260
DS Sum of digits problem.. [#permalink]

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06 Aug 2006, 20:36
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DS Sum of digits problem...
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Senior Manager
Joined: 22 May 2006
Posts: 368
Location: Rancho Palos Verdes

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06 Aug 2006, 23:01
Pin number = abca
Given 2a+b+c = 24

S1. a+c = 13 insuff.
S2. b+a = 11 insuff.

Combine S1 and S2.
a+c+b+a = 24 same as given : insuff.
ex.
7467
8358

Hence E
_________________

The only thing that matters is what you believe.

SVP
Joined: 30 Mar 2006
Posts: 1728

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07 Aug 2006, 04:26
E

1) 1st + 3rd = 13 Insuff

2) 2nd + 4th = 11 Insuff

Together

9249 and 5685..... etc

hence not suff
Manager
Joined: 20 Mar 2006
Posts: 200

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11 Aug 2006, 20:03
abcd be the 4 digit pin
a=d
a+b+c+d=24

(1) a+c =13
a=7,b=4,c=6,d=7 numbers are 4,6,7

or a=6,b=5,c=7,d=6 numbers are 5,6,7
BCE

(2) b+d = 11
a=6,b=5,c=7,d=6 numbers are 5,6,7
a=8,b=3,c=5,d=8 numbers are 3,5,8
CE

(1)&(2)
a=6,b=5,c=7,d=6 numbers are 5,6,7
or
a=8,b=3,c=5,d=8 numbers are 3,5,8

Hence E

Heman
VP
Joined: 14 May 2006
Posts: 1403

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11 Aug 2006, 20:35
I'd say E too with no doubt...

there are several possibilities for the 1st st-t and several for the second when they are combined
11 Aug 2006, 20:35
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