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20 questions
1. The total number of factors of a prime number is
1
0
2
3
The HCF and LCM of 12, 21, 15 respectively are
3, 140
12, 420
3, 420
420, 3
The prime factorization of 3825 is:
3 x 52 x 21
32 x 52 x 17
32 x 52 x 35
32 x 17 x 19
The zeroes of the polynomial x2 ─ 3x ─m(m+3) are
m, m + 3 C. D.
─ m, m + 3
m, ─ (m + 3)
─ m, ─ (m + 3)
If one of the zeroes of the quadratic polynomial x2 + 3x + k is 2, then the value of k is:
− 7
− 2
10
− 10
The quadratic polynomial, the sum whose zeroes is ─ 5 and their product is 6, is
x2 + 5x + 6
x2 ─ 5x + 6
x2 ─ 5x ─ 6
─ x2 + 5x + 6
The zeroes of the quadratic polynomial x2 + kx + k, where
k ≠ 0,
cannot both be positive
cannot both be negative
are always unequal
are always equal
Assertion(A): 2 x2 + 14x + 20 have two zeroes.
Reason(R): A quadratic polynomial can have at most two zeroes.
Both (A) and (R) are correct, but (R) is not the correct explanation of (A).
Both (A) and (R) are correct and (R) is the correct explanation of (A).
Both (A) and (R) are incorrect.
(A) is correct, but (R) is incorrect.
The value of k for which the system of equations x + y _ 4 = 0 and 2x + ky = 3, has no solution, is:
− 2
= 2
3
2
The pair of equations x = 0 and x = ─ 4 has
a unique solution
no solution
infinitely many solutions
only solution (0, 0)
The value of k, for which the pair of linear equations kx + y = k2 and x + ky = 1 have infinitely many solutions is:
± 1
1
− 1
2
If ax + by = a2 ─ b2 and bx + ay = 0, then the value of (x + y) is:
a2 ─ b2
b ─ a
a ─ b
a2 + b2
Assertion(A): Equations 3x + 4y + 5 = 0 and 6x + 8y + 9 = 0 represents a pair of parallel lines.
Reason(R): Two lines a1x + b1y + c1 = 0 and a2x + b2y + c2 = 0 represent parallel lines if a1/a2 = b1/b2 = c1/c2
Both Assertion and Reason are correct, and (R) is the correct explanation for (R)
Both Assertion and Reason are incorrect
The assertion is correct but the Reason is incorrect
The assertion is incorrect, but the Reason is correct
If A (m/3, 5) is the mid-point of the line segment joining the points Q( ─ 6, 7) and R( ─ 2, 3), the value of m is:
─ 12
─ 4
12
─ 6
If the point P(k, 0) divides the line segment joining the points A(2, ─ 2) and B(─ 7, 4) in the ratio 1: 2, then the value of k is:
1
2
─ 2
─ 1
It is being given that the points A(1, 2), B(0, 0), and C(a, b) are collinear. Which of the following relations between a and b is true?
a = 2b
2a = b
a + b = 0
a ─ b = 0
The value of p, for which the points A(3, 1), B(5, p), and C(7, ─ 5) are collinear, is
─ 2
2
─ 1
1
A card is selected from a deck of 52 cards. The probability of it's being a red face card is:
3/26
3/13
2/13
1/2
Someone is asked to take a number from 1 to 100. The probability that it is a prime is:
1/5
1/4
6/25
13/50
Assertion: From a pack of 52 cards, the probability of drawing a red card queen is 1/20.
Reason: Probability of occurring of an event p(A) = Favourable outcomes
_________________
Total outcomes
Both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
Both Assertion and Reason are correct, and Reason is the correct explanation of Assertion.
The assertion is correct, but the Reason is incorrect.
Both Assertion and Reason are incorrect.
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