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On the number line above, p, q, r, s, and t are five consec [#permalink]
 07 Dec 2012, 08:30
Question Stats:
72% (01:34) correct
27% (01:09) wrong based on 5 sessions
Attachment: 
Number line.png [ 2.33 KiB | Viewed 909 times ]
On the number line above, p, q, r, s, and t are five consecutive even integers in increasing order. What is the average (arithmetic mean) of these five integers? (1) q + s =24 (2) The average (arithmetic mean) of q and r is 11.
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Re: On the number line above, p, q, r, s, and t are five consec [#permalink]
07 Dec 2012, 08:37
 On the number line above, p, q, r, s, and t are five consecutive even integers in increasing order. What is the average (arithmetic mean) of these five integers?{p, q, r, s, t} is an evenly spaced set thus its mean = median = middle term = r. (1) q + s =24. Since q, r and s are consecutive even integers, then q=r-2 and s=r+2 --> (r-2)+(r+2)=24 --> r=12. Sufficient. (2) The average (arithmetic mean) of q and r is 11. (r-2)+r=2*11 --> r=12. Sufficient. Answer: D.
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Re: On the number line above, p, q, r, s, and t are five consec [#permalink]
10 Dec 2012, 08:26
which is the level of the question? 500? tks a lot 
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Re: On the number line above, p, q, r, s, and t are five consec [#permalink]
10 Dec 2012, 08:42
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Re: On the number line above, p, q, r, s, and t are five consec [#permalink]
11 Dec 2012, 04:54
Walkabout wrote: Attachment: Number line.png On the number line above, p, q, r, s, and t are five consecutive even integers in increasing order. What is the average (arithmetic mean) of these five integers? (1) q + s =24 (2) The average (arithmetic mean) of q and r is 11. Ans. : Let p=x, q=x+2, r=x+4 , s=x+6, t=x+8 to find the mean we need to find x. From statement 1 , we get 2x+8=24 From statement 2 we get x+3=11 Therefore the answer is (D).
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Re: On the number line above, p, q, r, s, and t are five consec [#permalink]
16 Dec 2012, 13:38
My understanding of consecutive integers, is that they are separated by only 1, i.e. 3, 4, 5, 6, 7, 8
I was able to find the first statement sufficient, but not the second, mainly because the answer uses the formula p + (p+2) +....
Why is 2 being added to P?
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Re: On the number line above, p, q, r, s, and t are five consec [#permalink]
16 Dec 2012, 23:41
kelleygrad05 wrote: My understanding of consecutive integers, is that they are separated by only 1, i.e. 3, 4, 5, 6, 7, 8
I was able to find the first statement sufficient, but not the second, mainly because the answer uses the formula p + (p+2) +....
Why is 2 being added to P? We are not told that p, q, r, s, and t are consecutive integers. We are given that p, q, r, s, and t are five consecutive EVEN integers. Fir example 2, 4, 6, 8, 10.
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Re: On the number line above, p, q, r, s, and t are five consec
[#permalink]
16 Dec 2012, 23:41
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