In this article we are taking most refined sample questions that are taken from math section of CDS question paper and presenting it to you, so have a look and see if you are comfortable in solving these kind of questions then only you have any chance of clearing the CDS exam.

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CDS 2 2017 Elementary Mathematics Exam Important Questions

1. If the roots of the equation are in the ration p:q, then  is equal to
	a. 0
	b. 1
	c. 2
	d. 3
	Answer. a

	2.
	a. -15
	b. -5
	c. 0
	d. 5
	Answer. c

	3.
	a.
	b.
	c.
	d.
	Answer. c

	4.
	a. a+b+c
	b. 3
	c. 1
	d. 0
	Answer. c

	5.
	a. p-q = 0
	b. p+q-2 = 0
	c. p+q-1 = 0
	d. p-q-1 = 0
	Answer. d

	6.
	a. 0
	b. 1
	c. 2
	d. 3
	Answer. a

	7. The sum and difference of two expression are and respectively. The HCF of two expressions will be
	a. (x+1)
	b. (x-1)
	c. (3x+7)
	d. (2x-3)
	Answer. b

	8. If (s-a)+(s-b)+(s-c) = s, then the value of  will be
	a. 3
	b. 1
	c. 0
	d. -1
	Answer. b

	9.
	a. 1
	b. 9
	c. 10
	d. 13
	Answer. c

	10. Let p and q be non-zero integers. Consider the polynomial A(x) = x^2 + px+q It is given that (x – m) and (x – km) are simple factors of A(x), where m is a non-zero integer and k is a positive integer, k ≥ 2. Which one of the following is correct?
	a.
	b.
	c.
	d.
	Answer. b

	12.
	a. 7
	b. 5
	c. 3
	d. 1
	Answer. b

	13. if the linear factors of   are p and q, then p+q is equal to
	a. (x-1)(a+1)
	b. (x+1)(a+1)
	c. (x-1)(a-1)
	d. (x+1)(a-1)
	Answer. d

	14. If then is equal to (given that b≠0)
	a. 0
	b. 1
	c. ab
	d. 2ab
	Answer. a

	15.
	a. 7
	b. 9
	c. 11
	d. 13