RRB NTPC SAMPLE PAPER - ARITHMETIC - 72

1. The following points (3a, 0), (0, 3b), (a, 2b) forms a

(a) straight line
(b) triangle
(c) equilateral triangle
(d) None of these

2. The points A(–1, 4), B(5, 2) are the vertices of a triangle of which C(0,–3) is centroid, then the third vertex C is

(a) 4, 15
(b) 4, –15
(c) –4, –15
(d) None of these

3. Acute angle between the lines with slopes 3/4 and – 1/7 is

(a) 60°
(b) 45°
(c) 30°
(d) None of these

4. Which of the following expression is a polynomial in two variables?

(a) x2 – 2xy + y2 – x + y
(b) x3 + y3 + z3 –1
(c) x2 + 3x + 2
(d) x2 – 2x2 + 3x + 5

5. The degree of the polynomial 2x3 – 5x2 + x – 3 is

(a) 2
(b) 3
(c) 1
(d) 0

Railway Recruitment Board (RRB) NTPC Exams Study Kit

Answer:

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