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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 877 · 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.Half of 78 =
  2. 2.9 × 2 =
  3. 3.?851 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  4. 4.Double 16 =
  5. 5.9 × 2 = ?8 — what is the missing digit?
  6. 6.1 + 3 + 5 + … + 25 =
  7. 7.Magic square (every row, column and diagonal has the same total): 2 9 4 | 7 5 3 | 6 1 ?. What is the missing number?
  8. 8.A piggy bank has 5 coins of ₹5 and 13 coins of ₹2. How many rupees are in it?
  9. 9.9 × 9 =
  10. 10.9 × 4 = ?6 — what is the missing digit?
  11. 11.9 × 6 = 5? — what is the missing digit?
  12. 12.9 × 4 = 3? — what is the missing digit?
  13. 13.You have 9 coins. Each coin is ₹1 or ₹2, and together they make ₹14. How many ₹2 coins do you have?
  14. 14.8?76 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  15. 15.39? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  16. 16.Magic square (every row, column and diagonal has the same total): ? 16 15 | 18 14 10 | 13 12 17. What is the missing number?
  17. 17.9 × 8 =
  18. 18.What comes next? 1, 5, 9, 13, ? (a) 13 (b) 17 (c) 18 (d) 21
  19. 19.12345 × 8 + 5 =
  20. 20.If today is Saturday, what day will it be after 72 days? (a) Thursday (b) Sunday (c) Monday (d) Tuesday
  21. 21.1 + 3 + 5 + … + 15 =
  22. 22.12 × 4 =
  23. 23.123 × 9 + 4 =
  24. 24.What comes next? 1, 2, 4, 8, ? (a) 14 (b) 17 (c) 16 (d) 12
  25. 25.1 + 2 + 3 + … + 54 =
  26. 26.396 + 693 =
  27. 27.1 + 3 + 5 + … + 11 =
  28. 28.If today is Saturday, what day was it 40 days ago? (a) Sunday (b) Monday (c) Thursday (d) Tuesday
  29. 29.The 2nd of a month is a Wednesday. What day is the 21st of the same month? (a) Monday (b) Thursday (c) Tuesday (d) Sunday
  30. 30.1 + 2 + 3 + … + 10 =
  31. 31.54 × 100 =
  32. 32.Magic square (every row, column and diagonal has the same total): 4 9 2 | 3 ? 7 | 8 1 6. What is the missing number?
  33. 33.38?1 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  34. 34.Double 32 =
  35. 35.Magic square (every row, column and diagonal has the same total): 19 ? 11 | 5 13 21 | 15 17 7. What is the missing number?
  36. 36.48 × 4 =
  37. 37.What comes next? 3, 6, 12, 24, ? (a) 42 (b) 49 (c) 48 (d) 36
  38. 38.9 × 3 = 2? — what is the missing digit?
  39. 39.9 × 8 = ?2 — what is the missing digit?
  40. 40.If today is Monday, what day will it be after 18 days? (a) Thursday (b) Saturday (c) Monday (d) Friday

Answer key

  1. 39
  2. 18
  3. 4
  4. 32
  5. 1
  6. 169
  7. 8
  8. 51
  9. 81
  10. 3
  11. 4
  12. 6
  13. 5
  14. 6
  15. 6
  16. 11
  17. 72
  18. 17
  19. 98765
  20. Monday
  21. 64
  22. 48
  23. 1111
  24. 16
  25. 1485
  26. 1089
  27. 36
  28. Monday
  29. Monday
  30. 55
  31. 5400
  32. 5
  33. 6
  34. 64
  35. 9
  36. 192
  37. 48
  38. 7
  39. 7
  40. Friday

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