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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 525 · 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.If today is Sunday, what day will it be after 74 days? (a) Thursday (b) Wednesday (c) Friday (d) Sunday
  2. 2.Odd one out: which number is NOT in the 3 times table? (a) 15 (b) 9 (c) 14 (d) 18
  3. 3.Double 79 =
  4. 4.1 + 2 + 3 + … + 66 =
  5. 5.A piggy bank has 9 coins of ₹5 and 11 coins of ₹2. How many rupees are in it?
  6. 6.9 × 6 =
  7. 7.What comes next? 4, 8, 12, 16, ? (a) 24 (b) 21 (c) 16 (d) 20
  8. 8.Magic trick! Think of 19. Double it, add 16, halve it, then take away 19. What number do you get?
  9. 9.Magic square (every row, column and diagonal has the same total): 30 9 24 | 15 21 27 | 18 33 ?. What is the missing number?
  10. 10.9 × 7 = ?3 — what is the missing digit?
  11. 11.Magic trick! Think of 7. Double it, add 18, halve it, then take away 7. What number do you get?
  12. 12.137? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  13. 13.9 × 2 = ?8 — what is the missing digit?
  14. 14.The ages of two twins add up to 14. How old is each twin?
  15. 15.12345679 × 18 =
  16. 16.Take 71 and take away the sum of its digits. What do you get?
  17. 17.9 × 4 = ?6 — what is the missing digit?
  18. 18.9 × 9 =
  19. 19.Think of 7. Multiply it by 2, then add 4. What number do you end with?
  20. 20.9 × 1 =
  21. 21.If today is Saturday, what day will it be after 19 days? (a) Friday (b) Sunday (c) Thursday (d) Wednesday
  22. 22.3 × 9 =
  23. 23.A father is 36 years old and his son is 13. How old was the father when the son was born?
  24. 24.Half of 174 =
  25. 25.What comes next? 3, 6, 12, 24, ? (a) 42 (b) 49 (c) 48 (d) 36
  26. 26.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  27. 27.Odd one out: which number is NOT in the 4 times table? (a) 28 (b) 20 (c) 34 (d) 16
  28. 28.957 × ? = 9570
  29. 29.In 2 years a boy will be 10 years old. How old was he 2 years ago?
  30. 30.You have 15 coins. Each coin is ₹1 or ₹2, and together they make ₹26. How many ₹2 coins do you have?
  31. 31.Take 89 and take away the sum of its digits. What do you get?
  32. 32.Magic square (every row, column and diagonal has the same total): 2 9 4 | 7 5 ? | 6 1 8. What is the missing number?
  33. 33.26 × 1000 =
  34. 34.Odd one out: which number is NOT in the 8 times table? (a) 24 (b) 40 (c) 56 (d) 63
  35. 35.9 × 10 = ?0 — what is the missing digit?
  36. 36.12 × 8 + 2 =
  37. 37.51 × 4 =
  38. 38.If today is Tuesday, what day will it be after 30 days? (a) Wednesday (b) Friday (c) Thursday (d) Sunday
  39. 39.Magic square (every row, column and diagonal has the same total): 13 15 5 | 3 ? 19 | 17 7 9. What is the missing number?
  40. 40.If today is Thursday, what day will it be after 98 days? (a) Sunday (b) Thursday (c) Friday (d) Wednesday

Answer key

  1. Thursday
  2. 14
  3. 158
  4. 2211
  5. 67
  6. 54
  7. 20
  8. 8
  9. 12
  10. 6
  11. 9
  12. 7
  13. 1
  14. 7
  15. 222222222
  16. 63
  17. 3
  18. 81
  19. 18
  20. 9
  21. Thursday
  22. 27
  23. 23
  24. 87
  25. 48
  26. 792
  27. 34
  28. 10
  29. 6
  30. 11
  31. 72
  32. 3
  33. 26000
  34. 63
  35. 9
  36. 98
  37. 204
  38. Thursday
  39. 11
  40. Thursday

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