The Circumference Worksheet Page 6
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10GRE PowerPrep Solutions
Test 1: First QR Section
Question 11 Test 1, First QR Section
If p is a negative number and 0 < s < |p|...?
Answer: s
Algebra: Exponents/Expression
2
– p
2
1. Supply two numbers to satisfy the equation 0 < s < | p | where p is a negative number:
s = 1, p = –2
2. Now plug these values into the expressions in the answer choices to find one that results in a
negative number. PowerScore test takers who analyze the answer choices will realize that they
can skip the first three answer choices because all three expressions are squared, meaning that all
three answer choices will always result in a positive number. So start with the fourth answer:
→
→
→
p
2
– s
2
(–2)
2
– 1
2
4 – 1
3
No
→
→
→
s
– p
1
– (–2)
1 – 4
–3
Yes!
2
2
2
2
Question 12 Test 1, First QR Section
10, 10, 10, 10, 8, 8, 8, 8, 12, 12, 11, y
The twelve numbers shown represent the ages....
Statistics: Median
Answer: 10
1. Arrange the 11 numbers given in order, from least to greatest:
8, 8, 8, 8, 10, 10, 10, 10, 11, 12, 12
We still have to add y, but what is the median of this list?
5 #s
5 #s
8, 8, 8, 8, 10, 10, 10, 10, 11, 12, 12
What happens if y is less than 10, such as y = 1?
5 #s
5 #s
1, 8, 8, 8, 8, 10, 10, 10, 10, 11, 12, 12
The median is still 10, because the median is now the average of the 6th and 7th terms [(10 + 10)
÷ 2 = 10]. The same thing happens if y is greater than 10, such as y = 11:
5 #s
5 #s
8, 8, 8, 8, 10, 10, 10, 10, 11, 11, 12, 12
The median is 10.
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