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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 818 · 40 questions
TalentJR

The trick (Choose a trick): × 9 → finger trick; × 4 → double double; × 10, 100, 1000 → slide and add zeros. 37, 12345679 or 111… → magic patterns; reverse and subtract → 1089. Puzzles: find the rule, the total or the leftover days, then check your answer.

NameDateTime takenScore ___ / 40
  1. 1.?46 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  2. 2.9 × 9 = 8? — what is the missing digit?
  3. 3.You have 8 coins. Each coin is ₹1 or ₹2, and together they make ₹13. How many ₹2 coins do you have?
  4. 4.13 × 4 =
  5. 5.Odd one out: which number is NOT in the 8 times table? (a) 32 (b) 16 (c) 33 (d) 40
  6. 6.9 × 2 = 1? — what is the missing digit?
  7. 7.Double 55 =
  8. 8.Magic square (every row, column and diagonal has the same total): 11 18 ? | 16 14 12 | 15 10 17. What is the missing number?
  9. 9.12345679 × 36 =
  10. 10.36 × 4 =
  11. 11.9 × 8 = 7? — what is the missing digit?
  12. 12.The ages of two twins add up to 20. How old is each twin?
  13. 13.?038 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  14. 14.Double 59 =
  15. 15.Odd one out: which number is NOT in the 7 times table? (a) 28 (b) 14 (c) 22 (d) 21
  16. 16.12345679 × 63 =
  17. 17.58 × 4 =
  18. 18.Think of 11. Multiply it by 2, then add 8. What number do you end with?
  19. 19.You have 10 coins. Each coin is ₹1 or ₹2, and together they make ₹18. How many ₹2 coins do you have?
  20. 20.Think of 11. Multiply it by 2, then add 4. What number do you end with?
  21. 21.Magic square (every row, column and diagonal has the same total): 15 5 19 | 17 13 9 | 7 21 ?. What is the missing number?
  22. 22.11 × 4 =
  23. 23.You have 15 coins. Each coin is ₹1 or ₹2, and together they make ₹21. How many ₹2 coins do you have?
  24. 24.74 × ? = 7400
  25. 25.If today is Saturday, what day was it 27 days ago? (a) Sunday (b) Saturday (c) Wednesday (d) Monday
  26. 26.9 × 4 = ?6 — what is the missing digit?
  27. 27.Magic square (every row, column and diagonal has the same total): 25 10 13 | 4 16 28 | 19 ? 7. What is the missing number?
  28. 28.Do the 1089 trick with 286: reverse and subtract, then reverse that answer and add. What do you get?
  29. 29.16?8 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  30. 30.5?27 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  31. 31.Take 27 and take away the sum of its digits. What do you get?
  32. 32.9 × 2 = ?8 — what is the missing digit?
  33. 33.Half of 22 =
  34. 34.Magic square (every row, column and diagonal has the same total): ? 9 16 | 15 13 11 | 10 17 12. What is the missing number?
  35. 35.Double 37 =
  36. 36.7 × 9 =
  37. 37.111111 × 111111 =
  38. 38.You have 14 coins. Each coin is ₹1 or ₹2, and together they make ₹20. How many ₹2 coins do you have?
  39. 39.Magic square (every row, column and diagonal has the same total): 10 ? 8 | 5 7 9 | 6 11 4. What is the missing number?
  40. 40.You have 7 coins. Each coin is ₹1 or ₹2, and together they make ₹9. How many ₹2 coins do you have?

Answer key

  1. 8
  2. 1
  3. 5
  4. 52
  5. 33
  6. 8
  7. 110
  8. 13
  9. 444444444
  10. 144
  11. 2
  12. 10
  13. 7
  14. 118
  15. 22
  16. 777777777
  17. 232
  18. 30
  19. 8
  20. 26
  21. 11
  22. 44
  23. 6
  24. 100
  25. Sunday
  26. 3
  27. 22
  28. 1089
  29. 3
  30. 4
  31. 18
  32. 1
  33. 11
  34. 14
  35. 74
  36. 63
  37. 12345654321
  38. 6
  39. 3
  40. 2

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