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Year 5 Mental Maths: Fiendish Quiz Challenges

Test your mental maths skills with this fiendish Year 5 quiz covering a variety of math topics! Find out how many seconds are in an hour, how many weeks are in 11 years, and what 13:13 is in 12-hour time. Challenge yourself with angles in triangles, converting units, finding areas and volumes, and working with prime numbers. Each question is designed to push your limits and make you think critically about mathematical concepts. Perfect for Year 5 students looking to sharpen their skills!

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Year 5 Mental Maths: Fiendish Quiz Challenges

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  1. Year 5 Mental Maths Facts Quiz Fiendish Level

  2. How many seconds in an hour? • 3600 seconds

  3. How many weeks in 11 years? • 572 weeks

  4. How many days are there in the first 6 months of the year (assuming it is not a Leap Year)? • 181 days

  5. What is 13:13 in 12 hour (analogue) time? • 1.13pm

  6. What is 5 past midnight in 24 hour (digital ) time? • 00:05

  7. How many acute angles are there is this triangle? • 3

  8. Name this triangle • scalene

  9. What is the size of the missing angle? • 78 ? 46 37 19

  10. What is the size of the missing angle? • 124 35 ? 21

  11. What is the size of the missing angle? • 156 41 ? 73

  12. What is a 4 as a decimal? 5 • 0.8

  13. What is 1 as a percentage? 10 • 10%

  14. What is 0.03 as a fraction? • 3 100

  15. What is 101% as a decimal? • 1.01

  16. What is 7% as a fraction? • 7 100

  17. List the first 10 prime numbers? • 2, 3, 5, 7, 11, 13, 17, 19, 23,29

  18. What is 9 ? 2 • 81

  19. What is the square root of 144? • 12

  20. What is the perimeter of this rectangle? • 42.6 cm 2.3cm 19cm

  21. What is the area of this rectangle? • 43.7 cm 2.3cm 19cm 2

  22. What is the volume of this cuboid? • 2640 cm 12cm 11cm 20cm 3

  23. Convert 4.05 kilograms to grams. • 4050g

  24. Convert 430 millimetres to metres. • 0.43 m

  25. What’s 10 ¾ litres in millilitres? • 10750 ml

  26. What’s 0.02 of a kilometre in metres? • 20m

  27. ? + 0.15 = 1 • 0.85

  28. How many faces does a pentagonal prism have? • 8

  29. What is this shape called? • Octahedron

  30. What is this shape called? • Septagon/heptagon

  31. How many vertices does a pentagonal based pyramid have? • 6

  32. What number does this Roman Numeral represent CX? • 110

  33. What number does this Roman Numeral represent MDLV? • 1555

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