ATI TEAS 7
TEAS Test Math Questions
1. Simplify (x^2 - y^2) / (x - y)
- A. x + y
- B. x - y
- C. 1
- D. (x + y)/(x - y)
Correct answer: A
Rationale: The expression ๐ฅ^2 - ๐ฆ^2 is a difference of squares, which follows the identity: ๐ฅ^2 - ๐ฆ^2 = (๐ฅ + ๐ฆ)(๐ฅ - ๐ฆ). Therefore, the given expression becomes: (๐ฅ^2 - ๐ฆ^2) / (๐ฅ - ๐ฆ) = (๐ฅ + ๐ฆ)(๐ฅ - ๐ฆ) / (๐ฅ - ๐ฆ). Since (๐ฅ - ๐ฆ) appears in both the numerator and the denominator, they cancel each other out, leaving ๐ฅ + ๐ฆ. Thus, the simplified form of (๐ฅ^2 - ๐ฆ^2) / (๐ฅ - ๐ฆ) is ๐ฅ + ๐ฆ. Therefore, the correct answer is A (x + y). Option B (x - y) is incorrect as it does not result from simplifying the given expression. Option C (1) is incorrect as it does not account for the variables x and y present in the expression. Option D ((x + y)/(x - y)) is incorrect as it presents the simplified form in a different format than the correct answer.
2. What is the mode of the data set: 2, 3, 3, 4, 4, 4, 5?
- A. 2
- B. 3
- C. 4
- D. 5
Correct answer: C
Rationale: The mode of a data set is the value that appears most frequently. In this data set (2, 3, 3, 4, 4, 4, 5), the number 4 appears three times, which is more frequent than any other number in the set. Therefore, the correct answer is 4. Choice A (2), B (3), and D (5) do not appear as frequently as 4 in the data set, so they are not the mode.
3. Robert scores three new clients every eight months. After how many months has he secured 24 new clients?
- A. 64
- B. 58
- C. 52
- D. 66
Correct answer: A
Rationale: To find out the number of months needed to secure 24 new clients, you can set up a proportion: 3 clients / 8 months = 24 clients / x months. Cross multiplying gives you 3x = 24 * 8. Solving for x: 3x = 192, x = 192 / 3, x = 64. Therefore, Robert will secure 24 new clients after 64 months. Choice A is correct. Choice B (58), Choice C (52), and Choice D (66) are incorrect as they do not align with the correct calculation based on the given proportion.
4. What is the formula to find the circumference of a circle?
- A. Circumference = 2ฯr
- B. Circumference = ฯrยฒ
- C. Circumference = 2rยฒ
- D. Circumference = rยฒฯ
Correct answer: A
Rationale: The correct formula to find the circumference of a circle is C = 2ฯr, where C represents the circumference and r is the radius of the circle. Choice B, Circumference = ฯrยฒ, represents the formula for the area of a circle rather than the circumference. Choice C, Circumference = 2rยฒ, is incorrect as it does not involve ฯ in the formula. Choice D, Circumference = rยฒฯ, has the terms reversed compared to the correct formula; the formula should start with the constant (2) multiplied by ฯ, followed by the radius.
5. Simplify the following expression: (2/7) รท (5/6)
- A. 2/5
- B. 35/15
- C. 5/21
- D. 12/35
Correct answer: D
Rationale: To divide fractions, you multiply the first fraction by the reciprocal of the second fraction. In this case, (2/7) รท (5/6) becomes (2/7) ร (6/5) = 12/35. Therefore, the correct answer is 12/35. Choice A (2/5), choice B (35/15), and choice C (5/21) are incorrect because they do not correctly simplify the given expression.
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