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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 883 · 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. 1.6 × 9 =
  2. 2.Magic trick! Think of 14. Double it, add 6, halve it, then take away 14. What number do you get?
  3. 3.9 × 8 = ?2 — what is the missing digit?
  4. 4.62?0 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  5. 5.If today is Thursday, what day was it 56 days ago? (a) Sunday (b) Thursday (c) Wednesday (d) Friday
  6. 6.A father is 31 years old and his son is 9. How old was the father when the son was born?
  7. 7.What comes next? 25, 36, 49, 64, ? (a) 81 (b) 83 (c) 82 (d) 79
  8. 8.You have 15 coins. Each coin is ₹1 or ₹2, and together they make ₹20. How many ₹2 coins do you have?
  9. 9.9 × 9 = 8? — what is the missing digit?
  10. 10.1 × 9 =
  11. 11.767 × 10 =
  12. 12.What comes next? 9, 16, 25, 36, ? (a) 49 (b) 50 (c) 51 (d) 47
  13. 13.Magic square (every row, column and diagonal has the same total): 15 ? 17 | 16 14 12 | 11 18 13. What is the missing number?
  14. 14.Magic square (every row, column and diagonal has the same total): 6 20 10 | 16 12 8 | 14 4 ?. What is the missing number?
  15. 15.9 × 2 = 1? — what is the missing digit?
  16. 16.Half of 104 =
  17. 17.If today is Friday, what day will it be after 14 days? (a) Saturday (b) Monday (c) Thursday (d) Friday
  18. 18.If today is Thursday, what day will it be after 16 days? (a) Sunday (b) Tuesday (c) Saturday (d) Friday
  19. 19.8 × 4 =
  20. 20.Think of 6. Multiply it by 3, then add 1. What number do you end with?
  21. 21.37 × 21 =
  22. 22.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  23. 23.?74 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  24. 24.1 + 3 + 5 + … + 11 =
  25. 25.If today is Monday, what day will it be after 74 days? (a) Monday (b) Friday (c) Thursday (d) Saturday
  26. 26.Odd one out: which number is NOT in the 3 times table? (a) 6 (b) 8 (c) 12 (d) 18
  27. 27.29 × 1000 =
  28. 28.I thought of a number, added 2 and then doubled it. I got 12. What was my number?
  29. 29.56 × 4 =
  30. 30.618? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  31. 31.A piggy bank has 6 coins of ₹5 and 3 coins of ₹2. How many rupees are in it?
  32. 32.9 × 7 = ?3 — what is the missing digit?
  33. 33.15 × 4 =
  34. 34.9 × 9 = ?1 — what is the missing digit?
  35. 35.12345679 × 27 =
  36. 36.7 × ? = 7000
  37. 37.What comes next? 1, 2, 4, 8, ? (a) 12 (b) 17 (c) 16 (d) 14
  38. 38.16 × 4 =
  39. 39.82 × ? = 8200
  40. 40.37 × 1000 =

Answer key

  1. 54
  2. 3
  3. 7
  4. 1
  5. Thursday
  6. 22
  7. 81
  8. 5
  9. 1
  10. 9
  11. 7670
  12. 49
  13. 10
  14. 18
  15. 8
  16. 52
  17. Friday
  18. Saturday
  19. 32
  20. 19
  21. 777
  22. 693
  23. 7
  24. 36
  25. Friday
  26. 8
  27. 29000
  28. 4
  29. 224
  30. 3
  31. 36
  32. 6
  33. 60
  34. 8
  35. 333333333
  36. 1000
  37. 16
  38. 64
  39. 100
  40. 37000

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