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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 79 · 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.If today is Saturday, what day will it be after 94 days? (a) Friday (b) Tuesday (c) Wednesday (d) Monday
  2. 2.If today is Sunday, what day was it 55 days ago? (a) Thursday (b) Monday (c) Sunday (d) Tuesday
  3. 3.9 × 7 = 6? — what is the missing digit?
  4. 4.Magic square (every row, column and diagonal has the same total): 20 17 32 | 35 23 11 | ? 29 26. What is the missing number?
  5. 5.Magic square (every row, column and diagonal has the same total): 16 18 8 | 6 14 22 | 20 10 ?. What is the missing number?
  6. 6.Magic square (every row, column and diagonal has the same total): 16 14 24 | 26 18 ? | 12 22 20. What is the missing number?
  7. 7.Magic square (every row, column and diagonal has the same total): ? 8 7 | 10 6 2 | 5 4 9. What is the missing number?
  8. 8.30 × 4 =
  9. 9.A girl is 11 years old and her brother is 6 years older. How old will her brother be in 2 years?
  10. 10.If today is Thursday, what day will it be after 43 days? (a) Friday (b) Saturday (c) Thursday (d) Monday
  11. 11.9 × 9 = 8? — what is the missing digit?
  12. 12.Odd one out: which number is NOT in the 6 times table? (a) 48 (b) 36 (c) 44 (d) 24
  13. 13.Magic square (every row, column and diagonal has the same total): 9 ? 5 | 4 8 12 | 11 6 7. What is the missing number?
  14. 14.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  15. 15.693 + 396 =
  16. 16.9 × 9 = ?1 — what is the missing digit?
  17. 17.In 5 years a boy will be 14 years old. How old was he 6 years ago?
  18. 18.If today is Tuesday, what day will it be after 28 days? (a) Friday (b) Tuesday (c) Monday (d) Wednesday
  19. 19.I thought of a number, added 4 and then doubled it. I got 48. What was my number?
  20. 20.Odd one out: which number is NOT in the 3 times table? (a) 27 (b) 18 (c) 11 (d) 9
  21. 21.1 + 2 + 3 + … + 64 =
  22. 22.Magic square (every row, column and diagonal has the same total): 10 20 18 | 24 16 ? | 14 12 22. What is the missing number?
  23. 23.138 × 10 =
  24. 24.9 × 8 = 7? — what is the missing digit?
  25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
  26. 26.Magic square (every row, column and diagonal has the same total): 10 ? 8 | 5 7 9 | 6 11 4. What is the missing number?
  27. 27.Half of 36 =
  28. 28.Half of 144 =
  29. 29.?520 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  30. 30.9 × 6 = ?4 — what is the missing digit?
  31. 31.Half of 72 =
  32. 32.What comes next? 7, 9, 11, 13, ? (a) 13 (b) 16 (c) 17 (d) 15
  33. 33.I thought of a number, added 6 and then doubled it. I got 26. What was my number?
  34. 34.44 × 10 =
  35. 35.8 × 9 =
  36. 36.18 × 4 =
  37. 37.I thought of a number, added 5 and then doubled it. I got 28. What was my number?
  38. 38.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  39. 39.You have 10 coins. Each coin is ₹1 or ₹2, and together they make ₹12. How many ₹2 coins do you have?
  40. 40.9 × 7 =

Answer key

  1. Tuesday
  2. Monday
  3. 3
  4. 14
  5. 12
  6. 10
  7. 3
  8. 120
  9. 19
  10. Friday
  11. 1
  12. 44
  13. 10
  14. 792
  15. 1089
  16. 8
  17. 3
  18. Tuesday
  19. 20
  20. 11
  21. 2080
  22. 8
  23. 1380
  24. 2
  25. 693
  26. 3
  27. 18
  28. 72
  29. 2
  30. 5
  31. 36
  32. 15
  33. 7
  34. 440
  35. 72
  36. 72
  37. 9
  38. 891
  39. 2
  40. 63

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