CBSE Class 10 Mathematics Quiz

The value(s) of k for which the quadratic equation 2x^2 + kx + 2 = 0 has equal roots, is

• 4

• ±4

• -4

• 0

Which of the following is not an A.P.?

• - 1.2, 0.8, 2.8,...

• 3, 3+2, 3+3, ...

• 4, 7, 9, 12,...

• -1, -2, -3,...

The radius of a sphere (in cm) whose volume is 12π cm^3, is

• 3

• √3

• 2√3

• 1√3

The distance between the points (m, -n) and (-m, n) is

• √(m^2 + n^2)

• m + n

• √(2m + 2n)

• √(2m + 2n)

In Figure-1, from an external point P, two tangents PQ and PR are drawn to a circle of radius 4 cm with centre O. If ∠QPR=90, then length of PQ is

• 3 cm

• 4 cm

• 2 cm

• 2√2 cm

On dividing a polynomial p(x) by 2x - 4, quotient and remainder are found to be x and 3 respectively. The polynomial p(x) is

• 2x^3 + x - 12

• 3x - 4x + 3

• 2x + 3x - 4

• 3x - 4x - 3

In Figure-2, DE || BC. If AD = 3, DB = 2 and AE = 2.7 cm, then EC is equal to

• 2.0 cm

• 1.8 cm

• 4.0 cm

• 2.7 cm

The point on the x-axis which is equidistant from (-4, 0) and (10, 0) is

• (7, 0)

• (5, 0)

• (0, 0)

• (3, 0)

The centre of a circle whose end points of a diameter are (-6, 3) and (6, 4) is

• (8, -1)

• (4, 7)

• (0, 7)

• (4, 7)

The pair of linear equations 3x + 5y = 7 and 9x + 10y = 14

• consistent

• inconsistent

• consistent with one solution

• consistent with many solutions