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Each statement has two choices. Compare the two quantities.

A = first choice is greater all the time, no matter what
B = second choice is greater all the time, no matter what
C = both choices are equal all the time, no matter what
D = the relationship cannot be determined from the information given (not A, B, or C)

You have until 11 AM PST, 2 PM EST. If there is a tie, whoever sent it first wins. You must save one of the four nominees if you win this challenge.

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a < 0

1. 4a or a⁴

x > 0

2. 10x or 10/x

ab < 0

3. (a+b)² or a² + b²

a, b, and c are the measures of the angles of isosceles triangle ABC.
x, y, and z are the measures of the angles of right triangle XYZ.

4. The average of a, b, and c or The average of x, y, and z.

In the addition problem below, each letter stands for a different digit.

~AB
+CD
ADC

5. A or 1

6. 99 + 299 + 499 or 103 + 305 + 507

7. The area of a circle whose radius is 17 or The area of a circle whose diameter is 35

Line l goes through (1,1) and (5,2). Line m is perpendicular to l.

8. The slope of line l or The slope of line m.

x is a positive integer.

9. The number of multiples of 3 between 100 and x + 100 or The number of multiples of 7 between 100 and x + 100

x, y, and z are three consecutive integers between 300 and 400

10. The average of x and z or The average of x, y, and z

x + y = 5
y - x = -5

11. y or 0

Stores A and B sell the same television set.
The regular price at Store A is 10% less than the regular price at store B.

12. The price of the television set when store A has a 10% off sale or The price of the television set when store B has a 20% off sale

13. 7/8 or (7/8)⁵

x > 0

14. √x or x

The number of square inches in the surface area of a cube is equal to the number of cubic inches in its volume.

15. The length of an edge of the cube or 6 inches

1 < x < 4

16. πx or x²

5b²/7b² = 5/7

17. b or 1

18. The number of different combinations of dimes and quarters whose value is $9.85 or 20

19. The volume of a cylinder whose height is 10 or The volume of a cone whose height is 10.

ABA x A = DCD

In the multiplication problem above, each letter represents a different digit.

20. B or 5

If you don't get numbers five and twenty, maybe this will help you.

A=5, B=2, C=3, D=1, E=8

AB + CD = EC
52 + 31 = 83

One person got ten right, and one person got sixteen right. Winner, please give me your decision as soon as possible.