Algebra Hard 5

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Question 1 of 10

1.
1 points
5 years ago the average age of P & Q was 15 years. Average age of P, Q & R today is 20 years. How old will R be after 10 years?
- 35
- 40
- 30
- 50
- 45
Correct

Incorrect/Not answered
Question 2 of 10

2.
1 points
If xy<0 and y>0 which of the following must be positive?
- x-y
- 2x+3y
- (x+10)/(y+2)
- (-y-2)/x
- x+y
Correct

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Question 3 of 10

3.
1 points
(4^41+4^42+4^43) is divisible by
- 7
- 13
- 15
- 17
- 11
Correct

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Question 4 of 10

4.
1 points
If 1/x² > x, then x must be
- Less than 1
- Equal to 0
- Between 0 and 1
- Equal to 1
- Greater than 1
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Question 5 of 10

5.
1 points
How many digits at most do you get in a number obtained by multiplying a two 3-digit numbers?
- 4
- 5
- 6
- 7
- 9
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Question 6 of 10

6.
1 points
The next number in the series, 7, 2, 6, 2, 5, 2,___?
- 3
- 5
- 4
- 2
- None
Correct

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Question 7 of 10

7.
1 points
If the sum of five consecutive integers is 40, what is the smallest of these five integers?
- 3
- 5
- 6
- 7
- 8
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Question 8 of 10

8.
1 points
If a is 3 less than b/2, then which of the following gives b in terms of a?
- (a+3)/2
- 2a+3
- 2(a-3)
- 2(3-a)
- 2(a+3)
Correct

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Question 9 of 10

9.
1 points
Which of the following numbers is a prime?
- 147
- 149
- 153
- 155
- 161
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Question 10 of 10

10.
1 points
Which is the best approximation of the product of (2.005) X (10.0025) X (0.0205)?
- 0.02
- 0.40
- 40
- 0.025
- 40.5
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