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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 856 · 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.What comes next? 16, 25, 36, 49, ? (a) 62 (b) 66 (c) 64 (d) 65
  2. 2.75 × 100 =
  3. 3.The ages of two twins add up to 8. How old is each twin?
  4. 4.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  5. 5.Double 48 =
  6. 6.1234 × 9 + 5 =
  7. 7.If today is Sunday, what day was it 23 days ago? (a) Saturday (b) Thursday (c) Monday (d) Friday
  8. 8.If today is Wednesday, what day was it 37 days ago? (a) Monday (b) Sunday (c) Thursday (d) Tuesday
  9. 9.9 × 9 = ?1 — what is the missing digit?
  10. 10.Half of 16 =
  11. 11.1 + 3 + 5 + … + 19 =
  12. 12.9 × 5 = 4? — what is the missing digit?
  13. 13.4 × 9 =
  14. 14.Odd one out: which number is NOT in the 8 times table? (a) 32 (b) 40 (c) 39 (d) 24
  15. 15.Take 967. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  16. 16.I thought of a number, multiplied it by 3 and added 1. I got 10. What was my number?
  17. 17.Magic square (every row, column and diagonal has the same total): 8 13 12 | 15 11 ? | 10 9 14. What is the missing number?
  18. 18.You have 10 coins. Each coin is ₹1 or ₹2, and together they make ₹12. How many ₹2 coins do you have?
  19. 19.Magic square (every row, column and diagonal has the same total): 20 23 8 | 5 17 29 | ? 11 14. What is the missing number?
  20. 20.1 + 2 + 3 + … + 14 =
  21. 21.6 × 1000 =
  22. 22.1 + 3 + 5 + … + 31 =
  23. 23.Half of 162 =
  24. 24.Half of 154 =
  25. 25.11 × 11 =
  26. 26.Take 18 and take away the sum of its digits. What do you get?
  27. 27.50 × 100 =
  28. 28.Double 19 =
  29. 29.58 × 4 =
  30. 30.If today is Wednesday, what day will it be after 41 days? (a) Monday (b) Friday (c) Tuesday (d) Wednesday
  31. 31.?11 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  32. 32.20?7 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  33. 33.Think of 8. Multiply it by 5, then add 8. What number do you end with?
  34. 34.?951 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  35. 35.If today is Saturday, what day will it be after 56 days? (a) Saturday (b) Tuesday (c) Friday (d) Sunday
  36. 36.Magic square (every row, column and diagonal has the same total): 12 27 6 | 9 15 ? | 24 3 18. What is the missing number?
  37. 37.123456789 × 8 + 9 =
  38. 38.9 × 5 =
  39. 39.Take 81 and take away the sum of its digits. What do you get?
  40. 40.What comes next? 9, 16, 25, 36, ? (a) 51 (b) 50 (c) 49 (d) 47

Answer key

  1. 64
  2. 7500
  3. 4
  4. 891
  5. 96
  6. 11111
  7. Friday
  8. Monday
  9. 8
  10. 8
  11. 100
  12. 5
  13. 36
  14. 39
  15. 198
  16. 3
  17. 7
  18. 2
  19. 26
  20. 105
  21. 6000
  22. 256
  23. 81
  24. 77
  25. 121
  26. 9
  27. 5000
  28. 38
  29. 232
  30. Tuesday
  31. 7
  32. 9
  33. 48
  34. 3
  35. Saturday
  36. 21
  37. 987654321
  38. 45
  39. 72
  40. 49

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