JMI 11th Science Entrance Paper 2026 Answer Key

81. The sum of the zeroes of the polynomial $x^2 – 5x + 6$ is

(a) 6

(b) -6

(d) -5

Answer:

Explanation:

For a quadratic polynomial

ax^2 + bx + c

, the sum of the zeroes is

\frac{-b}{a}

. Here,

a=1, b=-5

. Thus, sum =

\frac{-(-5)}{1}

5

82. If two lines are parallel, their system of equations has

(a) One solution

(b) No solution

(d) Exactly two solutions

Answer:

Explanation:

83. For $ax^2 + bx + c = 0$ , the value of the discriminant is given by

(a) $b^2 – 4ac$

(b) $2ac – b^2$

(d) $b^2 + 4ac$

Answer:

(a)

b^2 – 4ac

Explanation:

The discriminant determines the nature of the roots of a quadratic equation and is calculated using the formula

D = b^2 – 4ac

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

(a) 1, 4, 7, …

(b) 3, 7, 12, 18, …

(d) -5, -2, 1, 4, …

Answer:

Explanation:

85. What is the value of $\sin 60^\circ$ ?

(a) $\frac{1}{2}$

(b) $\frac{\sqrt{3}}{2}$

(d) $\frac{\sqrt{2}}{2}$

Answer:

(b)

\frac{\sqrt{3}}{2}

Explanation:

By standard trigonometric ratios, the sine of 60 degrees is

\frac{\sqrt{3}}{2}

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