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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 920 · 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.I thought of a number, added 5 and then doubled it. I got 22. What was my number?
  2. 2.Magic square (every row, column and diagonal has the same total): 4 9 2 | ? 5 7 | 8 1 6. What is the missing number?
  3. 3.Double 54 =
  4. 4.1 + 2 + 3 + … + 37 =
  5. 5.1?94 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  6. 6.Odd one out: which number is NOT in the 5 times table? (a) 36 (b) 20 (c) 30 (d) 25
  7. 7.48 × 4 =
  8. 8.Magic square (every row, column and diagonal has the same total): ? 11 21 | 15 19 23 | 17 27 13. What is the missing number?
  9. 9.Odd one out: which number is NOT in the 6 times table? (a) 32 (b) 36 (c) 18 (d) 24
  10. 10.23 × 4 =
  11. 11.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  12. 12.Half of 114 =
  13. 13.11111 × 11111 =
  14. 14.If today is Saturday, what day was it 10 days ago? (a) Saturday (b) Wednesday (c) Thursday (d) Tuesday
  15. 15.1 + 2 + 3 + … + 29 =
  16. 16.If today is Sunday, what day will it be after 32 days? (a) Wednesday (b) Sunday (c) Friday (d) Thursday
  17. 17.46 × 4 =
  18. 18.I thought of a number, added 3 and then doubled it. I got 40. What was my number?
  19. 19.I thought of a number, multiplied it by 2 and added 5. I got 25. What was my number?
  20. 20.37 × 15 =
  21. 21.Double 73 =
  22. 22.111 × 111 =
  23. 23.A father is 42 years old and his son is 9. How old was the father when the son was born?
  24. 24.4 × 9 =
  25. 25.297 + 792 =
  26. 26.712 × 10 =
  27. 27.Magic square (every row, column and diagonal has the same total): 9 19 5 | 7 11 15 | 17 ? 13. What is the missing number?
  28. 28.18 × 4 =
  29. 29.9 × 5 = ?5 — what is the missing digit?
  30. 30.What comes next? 8, 13, 18, 23, ? (a) 23 (b) 33 (c) 29 (d) 28
  31. 31.9 × 2 = 1? — what is the missing digit?
  32. 32.?061 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  33. 33.A piggy bank has 6 coins of ₹5 and 12 coins of ₹2. How many rupees are in it?
  34. 34.If today is Saturday, what day will it be after 62 days? (a) Thursday (b) Saturday (c) Monday (d) Friday
  35. 35.1 + 2 + 3 + … + 86 =
  36. 36.Magic square (every row, column and diagonal has the same total): ? 11 32 | 29 23 17 | 14 35 20. What is the missing number?
  37. 37.1 + 2 + 3 + … + 33 =
  38. 38.9 × 1000 =
  39. 39.1 + 2 + 3 + … + 11 =
  40. 40.9 × 9 = ?1 — what is the missing digit?

Answer key

  1. 6
  2. 3
  3. 108
  4. 703
  5. 4
  6. 36
  7. 192
  8. 25
  9. 32
  10. 92
  11. 891
  12. 57
  13. 123454321
  14. Wednesday
  15. 435
  16. Thursday
  17. 184
  18. 17
  19. 10
  20. 555
  21. 146
  22. 12321
  23. 33
  24. 36
  25. 1089
  26. 7120
  27. 3
  28. 72
  29. 4
  30. 28
  31. 8
  32. 2
  33. 54
  34. Friday
  35. 3741
  36. 26
  37. 561
  38. 9000
  39. 66
  40. 8

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