Graphically, the pair of equations 6x – 3y + 10 = 0

2x – y + 9 = 0

• Intersecting at exactly one point

• Intersecting at two points

• Coincident

• Parallel

If a pair of linear equations is consistent, then

the lines will be

• parallel

• always coincident

• intersecting or coincident

• always intersecting

For what value of k, for the equations 3x – y + 8 = 0 and 6x – ky = -16 represents coincident lines?

• 12

• -12

• 2

• -2

If x = a, y = b is the solution of the equation x – y = 2 and x + y = 4, then the value of a and b are respectively

• 3 and 5

• 5 and 3

• 3 and 1

• -1 and -3

The angles of a triangle are x, y and 40°. The difference between the two angles x and y is 30°. The values of x and y are

• 45°, 75°

• 50°, 80°

• 55°, 85°

• 55°, 95°

If in the equation x + 2y = 10, the value of y is 6, then the value of x will be

• -2

• 2

• 4

• 5

The sum of the digits of a two-digit number is 9. If 27 is added to it, the digits of the number get reversed. The number is

• 27

• 72

• 45

• 36

If magnification is less than one. It implies

• object is smaller than image

• image is smaller than object

• image and object both are equal in size

• image and object are opposite to each other

If an image is formed erect on putting object near the mirror but the image is formed inverted on putting object far from the mirror, the

the mirror will be:

• Plane

• Concave

• Convex

• Plano convex

Which of the following statements is true about involuntary breathing?

• It is controlled by the bronchioles

• It is controlled by the pulmonary arterioles

• It is controlled by the alveolar-capillary network

• It is controlled by the neurons, located in the medulla and pons