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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 556 · 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.Magic square (every row, column and diagonal has the same total): 12 ? 6 | 9 15 21 | 24 3 18. What is the missing number?
  2. 2.1 + 3 + 5 + … + 25 =
  3. 3.Magic square (every row, column and diagonal has the same total): 14 12 22 | 24 16 8 | 10 ? 18. What is the missing number?
  4. 4.Magic square (every row, column and diagonal has the same total): 9 8 13 | ? 10 6 | 7 12 11. What is the missing number?
  5. 5.9 × 7 =
  6. 6.1 + 2 + 3 + … + 53 =
  7. 7.12345679 × 27 =
  8. 8.297 + 792 =
  9. 9.The ages of two twins add up to 22. How old is each twin?
  10. 10.What comes next? 3, 6, 12, 24, ? (a) 36 (b) 48 (c) 42 (d) 49
  11. 11.If today is Tuesday, what day was it 47 days ago? (a) Friday (b) Sunday (c) Thursday (d) Wednesday
  12. 12.Magic square (every row, column and diagonal has the same total): 11 16 ? | 10 12 14 | 15 8 13. What is the missing number?
  13. 13.911 × ? = 9110
  14. 14.9 × 9 = 8? — what is the missing digit?
  15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
  16. 16.Odd one out: which number is NOT in the 3 times table? (a) 6 (b) 21 (c) 19 (d) 12
  17. 17.If today is Monday, what day will it be after 49 days? (a) Sunday (b) Tuesday (c) Thursday (d) Monday
  18. 18.What comes next? 2, 4, 8, 16, ? (a) 33 (b) 28 (c) 24 (d) 32
  19. 19.Magic square (every row, column and diagonal has the same total): 13 23 21 | 27 19 ? | 17 15 25. What is the missing number?
  20. 20.10 × 4 =
  21. 21.5 × 9 =
  22. 22.312 × 10 =
  23. 23.Magic trick! Think of 6. Double it, add 6, halve it, then take away 6. What number do you get?
  24. 24.15 × ? = 15000
  25. 25.The 5th of a month is a Sunday. What day is the 25th of the same month? (a) Tuesday (b) Sunday (c) Saturday (d) Friday
  26. 26.Magic square (every row, column and diagonal has the same total): 7 8 3 | 2 6 ? | 9 4 5. What is the missing number?
  27. 27.Double 17 =
  28. 28.4 × 9 =
  29. 29.37 × 15 =
  30. 30.1 + 2 + 3 + … + 77 =
  31. 31.9 × 2 = ?8 — what is the missing digit?
  32. 32.1 + 3 + 5 + … + 19 =
  33. 33.A girl is 10 years old and her brother is 3 years older. How old will her brother be in 3 years?
  34. 34.You have 15 coins. Each coin is ₹1 or ₹2, and together they make ₹16. How many ₹2 coins do you have?
  35. 35.111111 × 111111 =
  36. 36.50 × 4 =
  37. 37.Magic square (every row, column and diagonal has the same total): 6 5 10 | 11 7 3 | 4 ? 8. What is the missing number?
  38. 38.5?79 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  39. 39.If today is Saturday, what day was it 8 days ago? (a) Thursday (b) Monday (c) Saturday (d) Friday
  40. 40.783 × 10 =

Answer key

  1. 27
  2. 169
  3. 20
  4. 14
  5. 63
  6. 1431
  7. 333333333
  8. 1089
  9. 11
  10. 48
  11. Thursday
  12. 9
  13. 10
  14. 1
  15. 693
  16. 19
  17. Monday
  18. 32
  19. 11
  20. 40
  21. 45
  22. 3120
  23. 3
  24. 1000
  25. Saturday
  26. 10
  27. 34
  28. 36
  29. 555
  30. 3003
  31. 1
  32. 100
  33. 16
  34. 1
  35. 12345654321
  36. 200
  37. 9
  38. 6
  39. Friday
  40. 7830

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