Section A — Multiple Choice Questions
Choose the correct option. (1 mark each)
1. The roots of x² − 5x + 6 = 0 are
2. The 10th term of the AP 3, 7, 11, … is
3. The sum of the first 10 terms of an AP with a = 2 and d = 3 is
4. The common ratio of the GP 2, 6, 18, … is
5. sin²θ + cos²θ =
6. The determinant of the matrix [[1, 2], [3, 4]] is
7. Two similar triangles have corresponding sides in the ratio 2 : 3. The ratio of their areas is
8. The slope of the line through (1, 2) and (3, 6) is
9. A tower casts a shadow equal to its height. The angle of elevation of the Sun is
10. The probability of getting a prime number on a single throw of a fair die is
Section B — Fill in the Blanks & True / False
Fill in each blank, or write True / False. (1 mark each)
11. The discriminant of ax² + bx + c = 0 is ______.
12. Every quadratic equation has two distinct real roots. ( )
13. The 5th term of the GP 3, 6, 12, … is ______.
14. A tangent to a circle is perpendicular to the radius at the point of contact. ( )
15. The mid-point of (2, 4) and (8, 10) is ______.
16. The volume of a cone with r = 3 cm and h = 4 cm is ______ cm³.
17. Dividend on a share is calculated on its face (nominal) value. ( )
18. The slope of the x-axis is ______.
Section C — Short Answer Questions
Show your working. (2 marks each)
19. Solve x² − 7x + 12 = 0.
20. Find the 15th term of the AP 5, 8, 11, …
21. Find A + B if A = [[1, 2], [3, 4]] and B = [[2, 0], [1, 5]].
22. Simplify (1 − cos²θ) cosec θ.
23. Find the equation of the line with slope 2 and y-intercept 3.
24. Find the cost of 50 shares of face value ₹100 bought at a premium of ₹20 each.
25. Find the surface area of a sphere of radius 7 cm. (π = 22/7)
26. A bag has 3 red and 5 blue balls. One ball is drawn at random. Find the probability that it is red.
Section D — Problem Solving
Show all steps. (4 marks each)
27. The product of two consecutive positive integers is 132. Form a quadratic equation and find the integers.
28. From a point 60 m from the foot of a tower, the angle of elevation of its top is 30°. Find (a) the height of the tower, and (b) the distance at which the angle of elevation becomes 60°. (Take √3 = 1.73.)
29. Find the sum of the first 25 terms of the AP 4, 9, 14, … and verify using the last term.
30. The areas of two similar triangles are 36 cm² and 100 cm². If a side of the smaller triangle is 6 cm, find the corresponding side of the larger triangle.