Q. Which of the following is NOT a property of harmonic progressions?
A.
The sum of the first n terms is finite.
B.
The terms can be negative.
C.
The terms can be fractions.
D.
The terms can be irrational.
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Solution
The sum of the first n terms of a harmonic progression diverges as n approaches infinity, hence it is not finite.
Correct Answer: A — The sum of the first n terms is finite.
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Q. Which of the following is NOT a property of logarithms?
A.
log_a(b*c) = log_a(b) + log_a(c)
B.
log_a(b/c) = log_a(b) - log_a(c)
C.
log_a(b^c) = c*log_a(b)
D.
log_a(b) + log_a(c) = log_a(b*c) + log_a(b)
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Solution
The last statement is incorrect as it does not follow the properties of logarithms.
Correct Answer: D — log_a(b) + log_a(c) = log_a(b*c) + log_a(b)
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Q. Which of the following is NOT a property of modular arithmetic?
A.
Closure
B.
Associativity
C.
Distributivity
D.
Non-commutativity
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Solution
Modular arithmetic is commutative for addition and multiplication, hence non-commutativity is not a property.
Correct Answer: D — Non-commutativity
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Q. Which of the following is NOT a property of polygons?
A.
Polygons are two-dimensional shapes.
B.
Polygons can have curved sides.
C.
Polygons are made up of straight line segments.
D.
Polygons can be classified as regular or irregular.
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Solution
Polygons are defined as shapes made up of straight line segments, so having curved sides disqualifies a shape from being a polygon.
Correct Answer: B — Polygons can have curved sides.
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Q. Which of the following is NOT a property of triangles?
A.
The longest side is opposite the largest angle.
B.
The shortest side is opposite the smallest angle.
C.
The area can be calculated using base and height.
D.
All angles must be acute.
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Solution
Not all triangles have all angles acute; for example, a right triangle has one angle that is 90 degrees.
Correct Answer: D — All angles must be acute.
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Q. Which of the following is NOT a valid representation of the decimal number 10 in any base?
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Solution
'22' cannot represent 10 in any base since it would require base 3 or higher.
Correct Answer: D — 22
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Q. Which of the following is the best definition of a factor?
A.
A number that can divide another number without leaving a remainder.
B.
A number that is a multiple of another number.
C.
A number that is less than another number.
D.
A number that is greater than one.
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Solution
A factor is defined as a number that divides another number without leaving a remainder.
Correct Answer: A — A number that can divide another number without leaving a remainder.
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Q. Which of the following is the correct factorization of the quadratic equation x^2 - 5x + 6?
A.
(x - 2)(x - 3)
B.
(x + 2)(x + 3)
C.
(x - 1)(x - 6)
D.
(x + 1)(x + 6)
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Solution
The quadratic x^2 - 5x + 6 factors to (x - 2)(x - 3).
Correct Answer: A — (x - 2)(x - 3)
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Q. Which of the following is the correct property of logarithms?
A.
log_a(b) + log_a(c) = log_a(bc)
B.
log_a(b) - log_a(c) = log_a(b/c)
C.
log_a(b^c) = c * log_a(b)
D.
All of the above
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Solution
All the listed properties are correct and fundamental to logarithmic functions.
Correct Answer: D — All of the above
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Q. Which of the following is the correct representation of the decimal number 15 in base-2?
A.
1111
B.
1011
C.
1101
D.
1001
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Solution
The decimal number 15 is represented as '1111' in binary.
Correct Answer: A — 1111
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Q. Which of the following is the correct simplification of (x^3 * y^2)^(2)?
A.
x^6 * y^4
B.
x^5 * y^2
C.
x^3 * y^2
D.
x^2 * y^3
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Solution
Using the power of a product property, (a*b)^n = a^n * b^n, we get (x^3)^2 * (y^2)^2 = x^6 * y^4.
Correct Answer: A — x^6 * y^4
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Q. Which of the following is the correct simplification of log_2(8) + log_2(4)?
A.
log_2(32)
B.
log_2(12)
C.
log_2(16)
D.
log_2(6)
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Solution
Using the property of logarithms, log_2(8) + log_2(4) = log_2(8*4) = log_2(32) = log_2(16).
Correct Answer: C — log_2(16)
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Q. Which of the following is the correct simplification of log_5(25) - log_5(5)?
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Solution
log_5(25) = 2 and log_5(5) = 1, thus log_5(25) - log_5(5) = 2 - 1 = 1.
Correct Answer: A — 1
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Q. Which of the following is the greatest common divisor (GCD) of 48 and 180?
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Solution
The GCD of 48 and 180 is 12, as it is the largest number that divides both without a remainder.
Correct Answer: A — 12
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Q. Which of the following is the result of simplifying (2^3)^2?
A.
2^5
B.
2^6
C.
2^7
D.
2^8
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Solution
Using the power of a power property, (a^m)^n = a^(m*n), we get (2^3)^2 = 2^(3*2) = 2^6.
Correct Answer: B — 2^6
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Q. Which of the following is true about the roots of the polynomial P(x) = x^2 + 4x + 4?
A.
It has two distinct real roots.
B.
It has one real root with multiplicity 2.
C.
It has no real roots.
D.
It has two complex roots.
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Solution
The polynomial can be factored as (x + 2)^2, indicating it has one real root with multiplicity 2.
Correct Answer: B — It has one real root with multiplicity 2.
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Q. Which of the following is true for the expression 2^(x+1) / 2^(x-1)? (2023)
A.
2^2
B.
2^0
C.
2^1
D.
2^3
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Solution
Using the property of exponents, we have 2^(x+1 - (x-1)) = 2^(x+1-x+1) = 2^2.
Correct Answer: C — 2^1
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Q. Which of the following is true for the expression 4^(x+1) = 16? (2023)
A.
x = 1
B.
x = 2
C.
x = 3
D.
x = 0
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Solution
Since 16 can be expressed as 4^2, we have 4^(x+1) = 4^2, leading to x + 1 = 2, thus x = 1.
Correct Answer: A — x = 1
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Q. Which of the following logarithmic expressions is equivalent to log_10(0.01)?
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Solution
Since 0.01 is 10^-2, log_10(0.01) = -2.
Correct Answer: A — -2
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Q. Which of the following logarithmic expressions is undefined?
A.
log_5(0)
B.
log_5(1)
C.
log_5(5)
D.
log_5(25)
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Solution
Logarithm of zero is undefined, hence log_5(0) is the correct answer.
Correct Answer: A — log_5(0)
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Q. Which of the following numbers is a multiple of both 4 and 6?
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Solution
12 is the smallest number that is a multiple of both 4 and 6.
Correct Answer: A — 12
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Q. Which of the following numbers is a multiple of both 8 and 12? (2023)
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Solution
The LCM of 8 and 12 is 24, which is a multiple of both.
Correct Answer: A — 24
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Q. Which of the following numbers is divisible by 11?
A.
121
B.
123
C.
124
D.
125
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Solution
121 is divisible by 11, as 121 = 11 x 11.
Correct Answer: A — 121
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Q. Which of the following numbers is divisible by 8?
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Solution
A number is divisible by 8 if the last three digits form a number that is divisible by 8. 64 is divisible by 8.
Correct Answer: A — 64
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Q. Which of the following numbers is NOT divisible by 12?
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Solution
55 is not divisible by 12, as it does not meet the criteria of being divisible by both 3 and 4.
Correct Answer: C — 55
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Q. Which of the following numbers is NOT divisible by 3?
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Solution
A number is divisible by 3 if the sum of its digits is divisible by 3. The sum of the digits of 22 (2 + 2 = 4) is not divisible by 3.
Correct Answer: C — 22
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Q. Which of the following pairs of angles are complementary?
A.
30 degrees and 60 degrees
B.
45 degrees and 45 degrees
C.
90 degrees and 0 degrees
D.
All of the above
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Solution
Complementary angles are two angles whose sum is 90 degrees. All the given pairs meet this criterion.
Correct Answer: D — All of the above
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Q. Which of the following pairs of angles are supplementary?
A.
Two acute angles
B.
Two obtuse angles
C.
An acute angle and an obtuse angle
D.
Two right angles
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Solution
Supplementary angles are two angles that add up to 180 degrees. An acute angle (less than 90 degrees) and an obtuse angle (more than 90 degrees) can add up to 180 degrees.
Correct Answer: C — An acute angle and an obtuse angle
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Q. Which of the following pairs of equations represents parallel lines?
A.
2x + 3y = 6 and 4x + 6y = 12
B.
x - y = 1 and x + y = 1
C.
3x + 2y = 5 and 3x - 2y = 5
D.
x + 2y = 3 and 2x + 4y = 6
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Solution
The first pair has the same slope (2/3) and thus represents parallel lines.
Correct Answer: A — 2x + 3y = 6 and 4x + 6y = 12
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Q. Which of the following pairs of linear equations has no solution?
A.
x + y = 2 and x + y = 4
B.
2x - y = 1 and 4x - 2y = 2
C.
3x + 2y = 6 and 6x + 4y = 12
D.
x - 2y = 3 and 2x - 4y = 6
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Solution
The first pair represents parallel lines, which means they will never intersect, hence no solution.
Correct Answer: A — x + y = 2 and x + y = 4
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