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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 481 · 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. 1.16 × ? = 16000
  2. 2.A piggy bank has 5 coins of ₹5 and 6 coins of ₹2. How many rupees are in it?
  3. 3.Think of 12. Multiply it by 4, then add 6. What number do you end with?
  4. 4.7 × 4 =
  5. 5.3 × 9 =
  6. 6.36 × 4 =
  7. 7.I thought of a number, added 4 and then doubled it. I got 48. What was my number?
  8. 8.9 × 1 =
  9. 9.Take 45 and take away the sum of its digits. What do you get?
  10. 10.The 7th of a month is a Monday. What day is the 19th of the same month? (a) Tuesday (b) Friday (c) Saturday (d) Sunday
  11. 11.1 + 2 + 3 + … + 42 =
  12. 12.37 × 9 =
  13. 13.Magic square (every row, column and diagonal has the same total): 26 ? 14 | 5 17 29 | 20 23 8. What is the missing number?
  14. 14.4 × 9 =
  15. 15.12345679 × 18 =
  16. 16.12 × 4 =
  17. 17.1234567 × 8 + 7 =
  18. 18.If today is Wednesday, what day was it 21 days ago? (a) Wednesday (b) Tuesday (c) Saturday (d) Thursday
  19. 19.Double 59 =
  20. 20.Double 38 =
  21. 21.What comes next? 9, 16, 25, 36, ? (a) 47 (b) 50 (c) 51 (d) 49
  22. 22.9 × 4 =
  23. 23.Magic square (every row, column and diagonal has the same total): 9 30 ? | 24 18 12 | 21 6 27. What is the missing number?
  24. 24.57 × 4 =
  25. 25.9 × 2 = 1? — what is the missing digit?
  26. 26.24 × 1000 =
  27. 27.The 2nd of a month is a Friday. What day is the 28th of the same month? (a) Tuesday (b) Wednesday (c) Thursday (d) Saturday
  28. 28.6 × 9 =
  29. 29.2 × 9 =
  30. 30.33 × 4 =
  31. 31.Think of 12. Multiply it by 5, then add 2. What number do you end with?
  32. 32.A piggy bank has 3 coins of ₹5 and 8 coins of ₹2. How many rupees are in it?
  33. 33.What comes next? 12, 17, 22, 27, ? (a) 32 (b) 37 (c) 27 (d) 33
  34. 34.Double 35 =
  35. 35.1 + 3 + 5 + … + 25 =
  36. 36.11111 × 11111 =
  37. 37.Odd one out: which number is NOT in the 5 times table? (a) 30 (b) 15 (c) 36 (d) 20
  38. 38.9 × 5 =
  39. 39.The ages of two twins add up to 26. How old is each twin?
  40. 40.280? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?

Answer key

  1. 1000
  2. 37
  3. 54
  4. 28
  5. 27
  6. 144
  7. 20
  8. 9
  9. 36
  10. Saturday
  11. 903
  12. 333
  13. 11
  14. 36
  15. 222222222
  16. 48
  17. 9876543
  18. Wednesday
  19. 118
  20. 76
  21. 49
  22. 36
  23. 15
  24. 228
  25. 8
  26. 24000
  27. Wednesday
  28. 54
  29. 18
  30. 132
  31. 62
  32. 31
  33. 32
  34. 70
  35. 169
  36. 123454321
  37. 36
  38. 45
  39. 13
  40. 8

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