Are all of the terms in Set A equal?

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Manager

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Are all of the terms in Set A equal? [#permalink]

22 Dec 2012, 08:45

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Are all of the terms in Set A equal?

(1) The sum of all 14 terms in Set A is 98.
(2) The sum of any 3 terms in Set A is 21.

[Reveal] Spoiler: OA

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Re: Are all of the terms in Set A equal? [#permalink]

22 Dec 2012, 08:52

I must have misunderstood the question.

I picked b, because if any 3 numbers in the set always equal 21, then all terms must be the same. In this case 7.

What did I do wrong?

Manager

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Re: Are all of the terms in Set A equal? [#permalink]

23 Dec 2012, 02:37

Hiho wrote:

I must have misunderstood the question.

I picked b, because if any 3 numbers in the set always equal 21, then all terms must be the same. In this case 7.

What did I do wrong?

There could be only three elements in set e.g {18,2,1}

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Re: Are all of the terms in Set A equal? [#permalink]

23 Dec 2012, 02:42

vishu1414 wrote:

Hiho wrote:

I must have misunderstood the question.

I picked b, because if any 3 numbers in the set always equal 21, then all terms must be the same. In this case 7.

What did I do wrong?

There could be only three elements in set e.g {18,2,1}

Oh, ofcourse! The only use we had of statement one wss the ammount of terms in the set.

Thanks

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Re: Are all of the terms in Set A equal? [#permalink]

23 Dec 2012, 06:49

vishu1414 wrote:

Are all of the terms in Set A equal?

(1) The sum of all 14 terms in Set A is 98.
(2) The sum of any 3 terms in Set A is 21.

Similar question to practice from OG: are-all-of-the-numbers-in-a-certain-list-of-15-numbers-equal-144144.html
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Re: Are all of the terms in Set A equal? [#permalink] 23 Dec 2012, 06:49

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Are all of the terms in Set A equal?

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Are all of the terms in Set A equal?

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