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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 238 · 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. 1.12 × 1000 =
  2. 2.654 × ? = 6540
  3. 3.Odd one out: which number is NOT in the 3 times table? (a) 9 (b) 16 (c) 12 (d) 18
  4. 4.9 × 4 = 3? — what is the missing digit?
  5. 5.Half of 22 =
  6. 6.123456 × 9 + 7 =
  7. 7.What comes next? 4, 11, 18, 25, ? (a) 25 (b) 32 (c) 39 (d) 33
  8. 8.A piggy bank has 10 coins of ₹5 and 5 coins of ₹2. How many rupees are in it?
  9. 9.Half of 16 =
  10. 10.123456789 × 8 + 9 =
  11. 11.Double 36 =
  12. 12.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  13. 13.9 × 4 =
  14. 14.2 × ? = 200
  15. 15.32 × 100 =
  16. 16.If today is Thursday, what day will it be after 75 days? (a) Tuesday (b) Friday (c) Monday (d) Wednesday
  17. 17.A girl is 6 years old and her brother is 4 years older. How old will her brother be in 6 years?
  18. 18.If today is Friday, what day will it be after 66 days? (a) Tuesday (b) Sunday (c) Monday (d) Thursday
  19. 19.You have 10 coins. Each coin is ₹1 or ₹2, and together they make ₹11. How many ₹2 coins do you have?
  20. 20.53 × 4 =
  21. 21.9 × 2 = 1? — what is the missing digit?
  22. 22.I thought of a number, added 6 and then doubled it. I got 50. What was my number?
  23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
  24. 24.47 × 1000 =
  25. 25.9 × 1 =
  26. 26.If today is Sunday, what day was it 28 days ago? (a) Sunday (b) Wednesday (c) Monday (d) Saturday
  27. 27.Magic square (every row, column and diagonal has the same total): 16 6 8 | ? 10 18 | 12 14 4. What is the missing number?
  28. 28.9 × 8 = 7? — what is the missing digit?
  29. 29.9 × 2 = ?8 — what is the missing digit?
  30. 30.37 × 18 =
  31. 31.A girl is 8 years old and her brother is 5 years older. How old will her brother be in 6 years?
  32. 32.If today is Sunday, what day was it 39 days ago? (a) Wednesday (b) Tuesday (c) Saturday (d) Thursday
  33. 33.4 × 9 =
  34. 34.9 × 10 = ?0 — what is the missing digit?
  35. 35.1111 × 1111 =
  36. 36.1 + 2 + 3 + … + 47 =
  37. 37.709 × 10 =
  38. 38.Magic square (every row, column and diagonal has the same total): 13 8 15 | ? 12 10 | 9 16 11. What is the missing number?
  39. 39.What comes next? 3, 6, 12, 24, ? (a) 36 (b) 42 (c) 48 (d) 49
  40. 40.Magic square (every row, column and diagonal has the same total): 8 7 12 | ? 9 5 | 6 11 10. What is the missing number?

Answer key

  1. 12000
  2. 10
  3. 16
  4. 6
  5. 11
  6. 1111111
  7. 32
  8. 60
  9. 8
  10. 987654321
  11. 72
  12. 891
  13. 36
  14. 100
  15. 3200
  16. Tuesday
  17. 16
  18. Monday
  19. 1
  20. 212
  21. 8
  22. 19
  23. 891
  24. 47000
  25. 9
  26. Sunday
  27. 2
  28. 2
  29. 1
  30. 666
  31. 19
  32. Wednesday
  33. 36
  34. 9
  35. 1234321
  36. 1128
  37. 7090
  38. 14
  39. 48
  40. 13

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