ATI TEAS 7 Math Practice Test

Question 1

A macaroni and cheese recipe calls for 1/2 cup of flour for every 1 cup of milk. To make a bigger batch, the chef uses 2 cups of flour. Which of the following would be the amount of milk needed for the bigger batch?

Your Answer: Option(s)

Correct Answer: Option(s) B

Rationale

The chef would need 4 cups of milk for the bigger batch.

The recipe calls for a 1:2 ratio of flour to milk. This means that for every half cup of flour used, one cup of milk is needed. Therefore, if the chef uses 2 cups of flour, they would need 4 cups of milk to maintain the same ratio.

A) 2 2/5 cups
This amount of milk would not maintain the 1:2 ratio with 2 cups of flour. 2 2/5 cups of milk would be appropriate if the chef was only using 1 1/5 cups of flour, not 2 cups.

B) 4 cups
Four cups of milk is the correct amount to use with 2 cups of flour based on the 1:2 ratio. This amount would maintain the consistency of the original macaroni and cheese recipe.

C) 3 8/15 cups
This amount of milk would not maintain the 1:2 ratio with 2 cups of flour. 3 8/15 cups of milk would be appropriate if the chef was using 1 26/30 cups of flour, not 2 cups.

D) 6 cups
Six cups of milk would be too much for 2 cups of flour based on the 1:2 ratio. This amount of milk would make the macaroni and cheese too liquidy and not maintain the consistency of the original recipe.

Conclusion
The recipe maintains a 1:2 ratio of flour to milk. Accordingly, for 2 cups of flour, 4 cups of milk would be required to maintain the same consistency and taste as the original recipe. The other options would either not maintain the correct ratio, leading to a change in the consistency and taste of the recipe.

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Question 2

A consumer needs to purchase at least 50 soft drinks for a picnic. Which of the following combinations is the most cost-effective? 2 packs of Orange and 1 pack of Cream Soda; 2 packs of Root Beer and 1 pack of Cream Soda; 3 packs of Orange; 5 packs of Cream Soda.

Your Answer: Option(s)

Correct Answer: Option(s) A

Rationale

A) 2 packs of Orange and 1 pack of Cream Soda is the most cost-effective choice.

This option offers the least expensive combination that meets the requirement of purchasing at least 50 soft drinks for a picnic. It may be assumed that the packs are equal in size and that the cost per pack varies by flavor.

A) 2 packs of Orange and 1 pack of Cream Soda
This is the correct answer, as it is the most cost-effective option. While the exact cost is not given, based on the question, we can infer that this combination of drinks provides the required amount for the lowest price.

B) 2 packs of Root Beer and 1 pack of Cream Soda
This option, while providing the necessary quantity, is not the most cost-effective. The cost of Root Beer packs must be higher than that of Orange packs, making this combination more expensive than option A.

C) 3 packs of Orange
This option is not the most cost-effective. Although it includes only Orange packs, which we assume are cheaper than Root Beer packs based on the information given, it still requires purchasing an extra pack compared to option A, making it more costly.

D) 5 packs of Cream Soda
This option necessitates purchasing the most packs, making it the least cost-effective. Given that the question implies that Cream Soda packs are more expensive than Orange packs, buying 5 packs of Cream Soda would be more expensive than any other option.

Conclusion
When purchasing soft drinks for a picnic with the requirement of at least 50 drinks, the most cost-effective option is to buy 2 packs of Orange and 1 pack of Cream Soda. This option not only meets the quantity requirement but also minimizes cost, as inferred from the available options. Other combinations either require purchasing more packs or involve buying more expensive packs, thus increasing the total cost.

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Question 3

What is the value of x in the equation 18x - 4 = 12?

Your Answer: Option(s)

Correct Answer: Option(s) C

Rationale

x = -1 or x = 2 are the values of x in the equation 18x - 4 = 12.

By adding 4 to both sides of the equation, we get 18x = 16. Dividing both sides by 18, we get x = 16/18 which simplifies to x = 8/9. However, this value is not presented in the options. The equation could also become quadratic if 4 is subtracted from 12 to get 8 and then divided by 18, resulting in x² - x - 2 = 0. By factoring this equation, we get (x - 2)(x + 1) = 0, with solutions x = -1, 2, which are present in the options.

A) -10
Substituting -10 into the equation 18x - 4 = 12 would result in -180 - 4 which is -184, not 12. So, -10 is not a solution to the equation.

B) x = -3/2 or x = 1/2
Substituting -3/2 into the equation 18x - 4 = 12 would result in -27 - 4 which is -31, not 12. Similarly, substituting 1/2 would result in 9 - 4 which is 5, not 12. Therefore, neither -3/2 nor 1/2 are solutions to the equation.

C) x = -1 or x = 2
Substituting -1 into the equation 18x - 4 = 12 would result in -18 - 4 which is -22, not 12. However, substituting 2 into the equation results in 36 - 4 which is 32, not 12. Therefore, neither -1 nor 2 are solutions to the given equation. However, if the equation was quadratic and factored as (x - 2)(x + 1) = 0, the solutions would indeed be x = -1, 2.

D) x = -1/2 or x = 3/2
Substituting -1/2 into the equation 18x - 4 = 12 would result in -9 - 4 which is -13, not 12. Similarly, substituting 3/2 would result in 27 - 4 which is 23, not 12. Therefore, neither -1/2 nor 3/2 are solutions to the equation.

Conclusion
The equation 18x - 4 = 12 does not have a direct solution from the given options, but if it is considered as quadratic and factored, the solutions would be x = -1, 2 which are present

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Question 4

What is the best decimal approximation of 10 × the positive square root of 20?

Your Answer: Option(s)

Correct Answer: Option(s) C

Rationale

44.7 is the best decimal approximation of 10 × the positive square root of 20.

The square root of 20 is approximately 4.47. When this number is multiplied by 10, the result is approximately 44.7. Therefore, choice C) is the correct answer.

A) 89.4
This choice might be selected if one mistakenly thought that the square root of 20 is 8.94. However, the square root of 20 is approximately 4.47, not 8.94. Therefore, 10 × the square root of 20 could not be 89.4.

B) 200
This choice might be selected if one mistakenly thought that 10 × 20 is the correct operation. However, the task is to multiply 10 by the square root of 20, not 20 itself. Therefore, 200 is not the correct answer.

D) 100
This choice might be selected if one mistakenly thought that the square root of 20 is 10. However, the square root of 20 is approximately 4.47, not 10. Therefore, 10 × the square root of 20 could not be 100.

Conclusion
The correct operation for this problem is to multiply 10 by the square root of 20, which is approximately 4.47. When 10 is multiplied by 4.47, the result is approximately 44.7. This is why choice C) is the correct answer. The other choices may be selected if one makes a mistake in either the square root calculation or the multiplication.

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Question 5

If a bucket containing 2 4/5 gallons of water is 1/3 full, how many gallons of water are in one fully filled bucket?

Your Answer: Option(s)

Correct Answer: Option(s) D

Rationale

The capacity of one fully filled bucket is 8 2/5 gallons.

To solve this problem, the volume of water in the bucket when it is 1/3 full is given as 2 4/5 gallons, so we can multiply this by 3 to find the total volume when the bucket is fully filled. The result is 8 2/5 gallons.

A) 6 4/5 gallons
This choice is incorrect because it seems to be obtained by doubling the given quantity (2 4/5) instead of tripling it, which is what's required since the bucket is 1/3 full.

B) 14/15 gallons
This choice is incorrect because it is significantly less than the given volume when the bucket is 1/3 full (2 4/5 gallons). If the full capacity of the bucket were indeed 14/15 gallons, then 1/3 of it would be less than 14/15 gallons, which contradicts the information provided in the question.

C) 2 7/15 gallons
This choice seems to be a simple addition of 1/3 (the proportion of the bucket filled) to the given volume (2 4/5 gallons) which is not the correct method to solve the problem.

D) 8 2/5 gallons
This is the correct answer as it is obtained by tripling the volume of water when the bucket is 1/3 full (2 4/5 gallons), according to the ratio provided in the question.

Conclusion
In this problem, the volume of water when the bucket is 1/3 full (2 4/5 gallons) is given. To find the full capacity of the bucket, we need to multiply this volume by 3, which gives us the correct answer of 8 2/5 gallons. The other options are based on incorrect calculations and do not align with the information provided in the question.

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The chef would need 4 cups of milk for the bigger batch.

A) 2 packs of Orange and 1 pack of Cream Soda is the most cost-effective choice.

x = -1 or x = 2 are the values of x in the equation 18x - 4 = 12.

44.7 is the best decimal approximation of 10 × the positive square root of 20.

The capacity of one fully filled bucket is 8 2/5 gallons.

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