TEAS 7 Math Practice Test

Correct Answer: B

Rationale: To calculate a 20% decrease from 400 mg, we first find 20% of 400, which is 80 mg. Subtracting 80 mg from the current dosage of 400 mg gives us the new dosage after the decrease: 400 mg - 80 mg = 320 mg. Therefore, the correct answer is B (80 mg). Choices A, C, and D are incorrect as they do not accurately reflect a 20% decrease from the original 400 mg dosage.

Correct Answer: C

Rationale: To determine the number of male patients not overweight as children, we first find the total number of male patients by calculating 30% of 100, which equals 30. Then, we find the number of overweight men (10% of 30), which is 3. Subtracting 3 from the total number of male patients gives us the number of male patients not overweight as children, which is 27 (30 - 3 = 27). Therefore, the correct answer is C. Option A is too low, B does not account for the overweight men, and D is too high based on the calculations.

Correct Answer: B

Rationale: To calculate the number of tanks Robert needs, we divide the total distance by the car's mileage per tank: 1800 miles / 30 miles per gallon = 60 gallons needed. Since his tank holds 12 gallons, we divide the total gallons needed by the gallons per tank: 60 gallons / 12 gallons per tank = 5 tanks. Therefore, the correct answer is B: 5 tanks. Choice A (3 tanks) is incorrect because it doesn't consider the total distance. Choices C (30 tanks) and D (60 tanks) are incorrect as they grossly overestimate the number of tanks needed.

Correct Answer: D

Rationale: The product of two even integers and one odd integer will always be an even integer. This is because multiplying any number of even integers together results in an even number, and multiplying any number of odd integers together also results in an odd number. Therefore, the product could not be 3.75 (odd), 9 (odd), or 16.2 (even non-integer). The only possible option is 24, as it is an even integer and can be obtained by multiplying two even integers and one odd integer together.

Correct Answer: B

Rationale: To simplify the expression, we follow the order of operations (PEMDAS). Step 1: 7 + 16 = 23 Step 2: 6 * 3 = 18, then (5 + 18) = 23 Step 3: Now, the expression becomes 23 - 23 - 10 * 2 Step 4: 23 - 23 = 0, and 10 * 2 = 20 Step 5: Finally, 0 - 20 = -20 Therefore, the correct answer is B (-20). Explanation for other choices: A: -42 - Incorrect because it doesn't follow the correct order of operations. C: 23 - Incorrect, as it doesn't account for all the operations in the expression. D: 20 - Incorrect, as it doesn't consider the subtraction and multiplication operations properly.