RRB NTPC SAMPLE PAPER - ARITHMETIC - 152

1. The equation of a straight line passing through (1, 2) and perpendicular to the line 3x + 4y = 7 is

(a) 4x – 3y + 2 = 0
(b) 3x + 4y = 7
(c) 4x – 3y + 7 = 0
(d) None of these

2. Which of the following is a root of the polynomial f(x) = x³ – 2x² – x + 2?

(a) x = –2
(b) x = 1
(c) x = 3
(d) x = –3

3. If x = 2 is a root of the polynomial f (x) = 5x³ – 3x² + kx – 10, find the value of k.

(a) – 9
(b) 3
(c) 9
(d) – 3

4. If x = 1 and –1 are the roots of the polynomial f(x) = 2² + x² – ax + b. Find the values of a and b.

(a) 2, – 2
(b) – 2, – 1
(c) 2, – 1
(d) 1, – 2

5. The equation of the straight line parallel to ax + by + c = 0 and passing through the origin is

(a) ax – by = 0
(b) –bx + ay = 0
(c) ax + by = 0
(d) None of these

Railway Recruitment Board (RRB) NTPC Exams Study Kit

Answer:

1. (a) 2. (b) 3. (a) 4. (c) 5. (c)