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Question 1 of 4
1. Question
3 point(s)2B = 3A C = 2A
If A + B + C = 72, find A, B and C.
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A =
B =
C =
Correct 3 / 3 PointsIncorrect / 3 Points -
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Question 2 of 4
2. Question
4 point(s)This question is about four positive whole numbers, A, B, C and D. You are not told the value of these numbers, but you are told that they follow the following rules:
A = B multiplied by 2, B = C multiplied by 3, C = D multiplied by 4
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(a) What must be the value of (B x D) ÷ (A ÷ C)?
(b) If B is less than 70, what is the maximum possible value of D?
(c) You are now told that the mean of A, B, C and D is 41. What is the value of A?
Correct 4 / 4 PointsIncorrect / 4 Points -
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Question 3 of 4
3. Question
4 point(s)This question is about four positive whole numbers, A, B, C and D. You are not told the value of these numbers, but you are told that they follow the following rules:
A = 1/2B , B = 2C , C = 3D
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(a) What must be the value of (B ÷ C) ÷ (A – D)?
(b) If A is more than 20, what is the minimum possible value of D?
(c) You are now told that A + B + C + D = 130. What must be the value of B?
Correct 4 / 4 PointsIncorrect / 4 Points -
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Question 4 of 4
4. Question
4 point(s)This question is about four positive whole numbers, A, B, C and D. You are told that they follow the following rules:
2A = B, B = 1/4C, C = 2D
A + B + C + D = 75
What must be the values of A, B, C and D?
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A =
B =
C =
D =
Correct 4 / 4 PointsIncorrect / 4 Points -