(Study Material) RRB NTPC (Tier -2) Exam (Numerical Aptitude) - Basic Algebra

(Study Material) RRB NTPC (Tier -2) Exam (Numerical Aptitude) - Basic Algebra

1. If 1 + l/y = (y + 1)/y, what does y is equal to?

(a) y = 2
(b) y is any number expect 0
(c) y = 0
(d) y =1/2

2. If one of the roots of the quadratic equation a² + ba + 24 = 0 is 1.5, then what is the value of b?

(a) –17.5
(b) –12.7
(c) –15.25
(d) –14.5

3. Which of the following inequalities have a finite range of values of x´ satisfying them?

(a) x² + 5x + 6 > 0
(b) | x + 2 | > 4
(c) 9x – 7 <3x + 14
(d) x² – 4x + 3 < 0

4. If x is a number such that x² – 3x + 2 =0 and x² – x – 2 = 0, what is the value of x?

(a) –2
(b) 0
(c) 1
(d) 2

5. If one of the roots of the equation 2x² + 3x – k = 0 is 6, what is the value of k?

(a) 90
(b) 42
(c) 18
(d) –10

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