HSLC Mathematics Mock Test : HSLC āĻāĻŖāĻŋāϤ āĻĒā§ā§°ā§āĻŖāĻžāĻāĻ Mock Test
HSLC Mathematics Mock Test : HSLC āĻāĻŖāĻŋāϤ āĻĒā§ā§°ā§āĻŖāĻžāĻāĻ Mock Test
Section – A : MCQs (1 × 10 = 10 marks)
Q1. The HCF of 12 and 18 is: 12 āĻā§°ā§ 18 ā§° HCF āĻāĻŋāĻŽāĻžāύ ?
(a) 2 (b) 3 (c) 6 (d) 12
Ans: (c) 6
Explanation:
Common factors of 12 = 1, 2, 3, 4, 6
Common factors of 18 = 1, 2, 3, 6
Highest common factor = 6
āĻŦā§āϝāĻžāĻā§āϝāĻž: 12 āĻā§°ā§ 18 āĻĻā§āϝāĻŧā§āĻāĻžā§°ā§ āϏāĻžāϧāĻžā§°āĻŖ āĻā§āĻŖāύā§āϝāĻŧāĻā§° āĻāĻŋāϤ⧰āϤ āϏ⧰ā§āĻŦā§āĻā§āĻāĻā§ 6
Q2. The zero of polynomial x - 7 is:
x - 7 ā§° āĻļā§āύā§āϝ āĻŽāĻžāύ -
(a) 0 (b) 7 (c) −7 (d) 1
Ans: (b) 7
Explanation:āĻŦā§āϝāĻžāĻā§āϝāĻž: x − 7 = 0 ⇒ x = 7
Q3. Value of sin 30° is:
sin 30° ā§° āĻŽāĻžāύ -
(a) 1 (b) 1/2 (c) √3/2 (d) 0
Ans: (b) 1/2
Explanation: From standard trigonometric values.
āĻŦā§āϝāĻžāĻā§āϝāĻž: sin 30° ā§° āĻŽāĻžāύ ā§§/⧍
Q4. Distance between (0,0) and (3,4) is:
(0,0) āĻā§°ā§ (3,4) ā§° āĻĻā§ā§°āϤā§āĻŦ -
Ans: (a) 5
Explanation:
Distance = √[(3−0)² + (4−0)²]
= √(9 + 16) = √25 = 5
āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻĻā§ā§°āϤā§āĻŦā§° āϏā§āϤā§ā§° āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āĻā§°āĻŋ āĻŽāĻžāύ = 5
Q5. Mean of first 10 natural numbers is:
āĻĒā§ā§°āĻĨāĻŽ 10 āĻāĻž āϏā§āĻŦāĻžāĻāĻžā§ąāĻŋāĻ āϏāĻāĻā§āϝāĻžā§° āĻāĻĄāĻŧ -
An: (b) 5.5
Explanation: Mean = (First + Last) ÷ 2 = (1 + 10)/2 = 5.5
āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻāĻĄāĻŧ = (ā§§ + ā§§ā§Ļ) ÷ ⧍ = ā§Ģ.ā§Ģ
Section – B : Very Short Answer (2 × 10 = 20 marks)
Q6. Find HCF of 20 and 28.
Ans: 4
Explanation: Common factors = 1, 2, 4 → Highest = 4
āĻŦā§āϝāĻžāĻā§āϝāĻž: āϏāĻžāϧāĻžā§°āĻŖ āĻā§āĻŖāύā§āϝāĻŧāĻā§° āĻāĻŋāϤ⧰āϤ āϏ⧰ā§āĻŦā§āĻā§āĻ = 4
Q12. Write one zero of x² - 9.
Ans: 3 or −3
Explanation: x² − 9 = (x − 3)(x + 3)
āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻā§āĻŖāύā§āϝāĻŧāĻāϤ āĻāĻžāĻāĻŋāϞ⧠āĻŽā§āϞ = 3, −3
Q13. Find cos 60°.
Ans: 1/2
Explanation: Standard value. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻŽāĻžāύ āϤāĻžāϞāĻŋāĻāĻžā§° āĻĒā§°āĻž
Q14. Perimeter of square of side 6 cm.
Ans: 24 cm
Explanation: Perimeter = 4 × side = 4 × 6 = 24
āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻĒā§°āĻŋāϏā§āĻŽāĻž = ā§Ē × āĻŦāĻžāĻšā§
Section – C : Short Answer (4 × 10 = 40 marks)
Q21. Solve: 2x + 5 = 13
Soln: āϏāĻŽāĻžāϧāĻžāύ
2x = 13 − 5
2x = 8
x = 4
Q22. Find LCM of 12 and 15.
Soln: āϏāĻŽāĻžāϧāĻžāύ
12 = 2² × 3
15 = 3 × 5
LCM = 2² × 3 × 5 = 60
āĻŦā§āϝāĻžāĻā§āϝāĻž: āϏ⧰ā§āĻŦā§āĻā§āĻ āĻāĻžāϤ āϞ’āϞ⧠LCM = 60
Q23. Area of circle of radius 7 cm.
Soln: āϏāĻŽāĻžāϧāĻžāύ
Area = πr² = 22/7 × 7 × 7 = 154 cm²
Section – D : Long Answer (5 × 4 = 20 marks)
Q24. Solve: x² − 7x + 10 = 0
Soln: āϏāĻŽāĻžāϧāĻžāύ
x² − 5x − 2x + 10 = 0
(x − 5)(x − 2) = 0
x = 5, 2
Section C : Short Answer (3 × 5 = 15 marks)
Q5. Solve : āϏāĻŽāĻžāϧāĻžāύ āĻā§°āĻ : 2x² − 7x + 3 = 0
Soln: āϏāĻŽāĻžāϧāĻžāύ
2x² − 7x + 3 = 0
⇒ (2x − 1)(x − 3) = 0
So,
2x − 1 = 0 ⇒ x = 1/2
x − 3 = 0 ⇒ x = 3
Ans: x = 1/2, 3
Q6. Find the ratio in which point P(1, −2) divides the line joining A(−2, 2) and B(4, −4).
āĻŦāĻŋāύā§āĻĻā§ P(1, −2) āĻ A(−2, 2) āĻā§°ā§ B(4, −4) āϝā§āĻ āĻā§°āĻž ā§°ā§āĻāĻžāĻāĻļāĻā§ āĻāĻŋāĻŽāĻžāύ āĻ āύā§āĻĒāĻžāϤāϤ āĻŦāĻŋāĻāĻžāĻāύ āĻā§°āĻŋāĻā§ ?
Soln: āϏāĻŽāĻžāϧāĻžāύ
Let P divide AB in the ratio m : n
Using section formula:
x-coordinate:
1 = m(4) + n(−2) / m+n
⇒ m + n = 4m − 2n
⇒ 3n = 3m
⇒ m = n
Ratio āĻ āύā§āĻĒāĻžāϤ = 1 : 1
Section D : Long Answer (5 × 4 = 20 marks)
Q7. Find the roots of the quadratic equation x² − 4x − 5 = 0.
x² − 4x − 5 = 0 āϏāĻŽā§āĻā§°āĻŖāĻā§ā§° āĻŽā§āϞ āĻāϞāĻŋāϝāĻŧāĻžāĻāĻāĨ¤
Soln: āϏāĻŽāĻžāϧāĻžāύ
x² − 4x − 5 = 0
Using quadratic formula:
x = 4 ± √(−4)2−4(1)(−5)/2
x = 4± √16+20/2
x = 4± √36 / 2
x = 4 ± 6 / 2
So,
x = 5, −1
Q8. Find the curved surface area of a cone with radius 7 cm and slant height 24 cm.
āĻŦā§āϝāĻžāϏāĻžā§°ā§āϧ 7 cm āĻā§°ā§ āϤāĻŋā§°ā§āϝāĻ āĻāĻā§āĻāϤāĻž 24 cm āĻĨāĻāĻž āĻļāĻāĻā§° āĻŦāĻā§ā§° āĻĒā§āώā§āĻ ā§° āĻā§āώā§āϤā§ā§°āĻĢāϞ āĻāϞāĻŋāϝāĻŧāĻžāĻāĻāĨ¤
Soln: āϏāĻŽāĻžāϧāĻžāύ
Formula: CSA = πrl
= 22/7 × 7 × 24
= 528 cm²
Ans: 528 cm²
Exam Tips (HSLC):
- Steps āϏā§āĻĒāώā§āĻāĻā§ āϞāĻŋāĻāĻŋāĻŦāĻž
- Formula āĻāϞāĻžāĻĻāĻž āϞāĻžāĻāύāϤ āϞāĻŋāĻāĻŋāĻŦāĻž
- Units (cm²) āĻā§āϞ āύāĻā§°āĻŋāĻŦāĻž
- Final answer underline āĻā§°āĻŋāĻŦāĻž