Class 8 Maths Final Test Worksheet

Maths worksheets lesson 64: Class 8 final maths test · Set 21 · 40 sums

The method (Read, plan, check): Find the type of question first: power, square or cube, equation, identity, area or interest? Use the method from that lesson, step by step. Check: square or cube your root back, put equation answers back in, and work interest year by year.

1. 1.8.7 × 10² =
2. 2.Use (a + b)² = a² + 2ab + b² to find 11².
3. 3.Which of these is a perfect cube? (a) 3375 (b) 3618 (c) 4002
4. 4.Solve: 9t + 4 = 2t + 74. What is t?
5. 5.Find the compound interest on ₹28200 at 15% per year for 1 year, compounded every year (in ₹).
6. 6.A square garden has an area of 3249 square m. How long is each side (in m)?
7. 7.A trapezium has an area of 70 square cm. Its parallel sides are 4 cm and 3 cm. What is the distance between them (in cm)?
8. 8.Use (a + b)² = a² + 2ab + b² to find 91².
9. 9.A square garden has an area of 2401 square m. How long is each side (in m)?
10. 10.What is the difference between the compound interest and the simple interest on ₹7200 at 5% per year for 2 years (in ₹)?
11. 11.Write 1.2 × 10⁻⁴ as a decimal. =
12. 12.What is 20³? =
13. 13.A square garden has an area of 576 square m. How long is each side (in m)?
14. 14.How many whole numbers lie between 15² and 16²?
15. 15.If a − b = 3 and ab = 54, what is a² + b²?
16. 16.What is the smallest whole number by which 56 must be multiplied to get a perfect cube?
17. 17.8.6 × 10³ =
18. 18.Solve: 3(y − 5) = y + 7. What is y?
19. 19.What is ∛9261? =
20. 20.The total surface area of a cube is 1350 square cm. How long is each edge (in cm)?
21. 21.What is 99²? =
22. 22.The diagonals of a rhombus are 24 cm and 16 cm. What is its area (in square cm)?
23. 23.What is the smallest whole number by which 49 must be multiplied to get a perfect cube?
24. 24.What is 57²? =
25. 25.What is the value of 7³? =
26. 26.Find the compound interest on ₹17500 at 20% per year for 1 year, compounded every year (in ₹).
27. 27.Write 7⁷ × 7³ as a single power 7ⁿ. What is n?
28. 28.What is the difference between the compound interest and the simple interest on ₹50700 at 20% per year for 2 years (in ₹)?
29. 29.What is the value of 10⁵ × 10⁻⁶? =
30. 30.A cube has a volume of 3375 cubic cm. How long is each edge (in cm)?
31. 31.What is √2500? =
32. 32.Use a² − b² = (a + b)(a − b) to find 90² − 19².
33. 33.The sum of two consecutive whole numbers is 71. What is the largest of them?
34. 34.What is the value of 5⁶ × 5⁻²? =
35. 35.What is the smallest whole number by which 392 must be multiplied to get a perfect cube?
36. 36.Use (a + b)² = a² + 2ab + b² to find 42².
37. 37.What is the value of (1/7)⁻¹? =
38. 38.What is the value of 10⁴ × 10⁻¹? =
39. 39.Find the compound interest on ₹10700 at 15% per year for 1 year, compounded every year (in ₹).
40. 40.A trapezium has an area of 272 square cm. Its parallel sides are 27 cm and 5 cm. What is the distance between them (in cm)?

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