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Number Problems Worksheet

Quantitative aptitude lesson 27: Number problems · Set 332 · 40 questions
TalentJR

The method (Use the structure): n consecutive numbers with sum S: the middle (average) is S ÷ n. From sum and difference: larger = (sum + difference) ÷ 2, smaller = (sum − difference) ÷ 2. Swapping the digits changes the number by 9 × (difference of the digits). “k times another, difference D”: smaller = D ÷ (k − 1).

NameDateTime takenScore ___ / 40
  1. 1.The digits of a two-digit number add up to 15. When the digits swap places, the number goes up by 9. What is the number?
  2. 2.The sum of 3 consecutive numbers is 168. What is the smallest of them?
  3. 3.The sum of 4 consecutive even numbers is 300. What is the smallest of them?
  4. 4.The sum of 4 consecutive numbers is 34. What is the smallest of them?
  5. 5.The sum of 3 consecutive even numbers is 168. What is the largest of them?
  6. 6.The sum of 3 consecutive odd numbers is 51. What is the smallest of them?
  7. 7.The sum of 3 consecutive numbers is 180. What is the largest of them?
  8. 8.One number is 4 times another. Their difference is 69. What is the smaller number?
  9. 9.One number is 2 times another. Their difference is 30. What is the smaller number?
  10. 10.One number is 3 times another. Their difference is 38. What is the smaller number?
  11. 11.The sum of 4 consecutive even numbers is 252. What is the largest of them?
  12. 12.The sum of two numbers is 23 and their difference is 1. What is the smaller number?
  13. 13.One number is 2 times another. Their difference is 31. What is the smaller number?
  14. 14.The sum of two numbers is 136 and their difference is 4. What is the smaller number?
  15. 15.The digits of a two-digit number add up to 17. When the digits swap places, the number goes up by 9. What is the number?
  16. 16.One number is 5 times another. Their difference is 152. What is the smaller number?
  17. 17.The sum of 4 consecutive numbers is 166. What is the largest of them?
  18. 18.The sum of 3 consecutive numbers is 171. What is the smallest of them?
  19. 19.One number is 6 times another. Their difference is 50. What is the smaller number?
  20. 20.The sum of two numbers is 43 and their difference is 19. What is the smaller number?
  21. 21.The sum of 4 consecutive numbers is 218. What is the smallest of them?
  22. 22.The sum of two numbers is 85 and their difference is 3. What is the larger number?
  23. 23.The sum of 4 consecutive even numbers is 196. What is the largest of them?
  24. 24.The sum of 4 consecutive numbers is 90. What is the largest of them?
  25. 25.The digits of a two-digit number add up to 7. When the digits swap places, the number goes up by 45. What is the number?
  26. 26.The sum of 3 consecutive odd numbers is 111. What is the smallest of them?
  27. 27.The sum of 3 consecutive even numbers is 210. What is the largest of them?
  28. 28.The digits of a two-digit number add up to 12. When the digits swap places, the number goes up by 18. What is the number?
  29. 29.The sum of 3 consecutive even numbers is 150. What is the smallest of them?
  30. 30.The sum of 4 consecutive odd numbers is 144. What is the largest of them?
  31. 31.The digits of a two-digit number add up to 11. When the digits swap places, the number goes up by 45. What is the number?
  32. 32.The sum of two numbers is 53 and their difference is 35. What is the smaller number?
  33. 33.The sum of two numbers is 116 and their difference is 24. What is the smaller number?
  34. 34.One number is 6 times another. Their difference is 35. What is the smaller number?
  35. 35.The sum of 3 consecutive numbers is 63. What is the largest of them?
  36. 36.One number is 5 times another. Their difference is 56. What is the smaller number?
  37. 37.The sum of two numbers is 12 and their difference is 10. What is the larger number?
  38. 38.One number is 4 times another. Their difference is 114. What is the smaller number?
  39. 39.The digits of a two-digit number add up to 13. When the digits swap places, the number goes up by 9. What is the number?
  40. 40.The digits of a two-digit number add up to 16. When the digits swap places, the number goes up by 18. What is the number?

Answer key

  1. 78
  2. 55
  3. 72
  4. 7
  5. 58
  6. 15
  7. 61
  8. 23
  9. 30
  10. 19
  11. 66
  12. 11
  13. 31
  14. 66
  15. 89
  16. 38
  17. 43
  18. 56
  19. 10
  20. 12
  21. 53
  22. 44
  23. 52
  24. 24
  25. 16
  26. 35
  27. 72
  28. 57
  29. 48
  30. 39
  31. 38
  32. 9
  33. 46
  34. 7
  35. 22
  36. 14
  37. 11
  38. 38
  39. 67
  40. 79

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