← Number problems lesson New set →

Number Problems Worksheet

Quantitative aptitude lesson 27: Number problems · Set 786 · 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 17. When the digits swap places, the number goes up by 9. What is the number?
  2. 2.One number is 3 times another. Their difference is 10. What is the smaller number?
  3. 3.The sum of 5 consecutive numbers is 165. What is the largest of them?
  4. 4.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?
  5. 5.The sum of 3 consecutive numbers is 159. What is the smallest of them?
  6. 6.The sum of 3 consecutive odd numbers is 207. What is the smallest of them?
  7. 7.The sum of two numbers is 60 and their difference is 46. What is the smaller number?
  8. 8.The digits of a two-digit number add up to 9. When the digits swap places, the number goes up by 27. What is the number?
  9. 9.One number is 5 times another. Their difference is 152. What is the smaller number?
  10. 10.The sum of 3 consecutive even numbers is 126. What is the smallest of them?
  11. 11.The sum of 4 consecutive even numbers is 164. What is the smallest of them?
  12. 12.The sum of 3 consecutive odd numbers is 225. What is the smallest of them?
  13. 13.The sum of 3 consecutive numbers is 153. What is the largest of them?
  14. 14.The sum of 4 consecutive numbers is 186. What is the largest of them?
  15. 15.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?
  16. 16.The digits of a two-digit number add up to 8. When the digits swap places, the number goes up by 54. What is the number?
  17. 17.The sum of 4 consecutive odd numbers is 312. What is the smallest of them?
  18. 18.The sum of 3 consecutive even numbers is 108. What is the largest of them?
  19. 19.The sum of 4 consecutive numbers is 146. What is the largest of them?
  20. 20.The digits of a two-digit number add up to 11. When the digits swap places, the number goes up by 9. What is the number?
  21. 21.One number is 2 times another. Their difference is 18. What is the smaller number?
  22. 22.One number is 2 times another. Their difference is 16. What is the smaller number?
  23. 23.The sum of 3 consecutive even numbers is 192. What is the largest of them?
  24. 24.One number is 3 times another. Their difference is 40. What is the smaller number?
  25. 25.The sum of 4 consecutive numbers is 194. What is the smallest of them?
  26. 26.The sum of 4 consecutive numbers is 94. What is the largest of them?
  27. 27.The sum of 4 consecutive numbers is 58. What is the largest of them?
  28. 28.The sum of two numbers is 100 and their difference is 90. What is the larger number?
  29. 29.The digits of a two-digit number add up to 7. When the digits swap places, the number goes up by 9. What is the number?
  30. 30.The sum of 4 consecutive numbers is 62. What is the largest of them?
  31. 31.The sum of 4 consecutive numbers is 222. What is the largest of them?
  32. 32.One number is 2 times another. Their difference is 20. What is the smaller number?
  33. 33.The sum of 4 consecutive numbers is 178. What is the largest of them?
  34. 34.The sum of 3 consecutive numbers is 36. What is the largest of them?
  35. 35.The sum of 5 consecutive numbers is 285. What is the largest of them?
  36. 36.The sum of two numbers is 124 and their difference is 48. What is the smaller number?
  37. 37.The sum of 3 consecutive numbers is 54. What is the largest of them?
  38. 38.The sum of 3 consecutive odd numbers is 237. What is the smallest of them?
  39. 39.The sum of 5 consecutive numbers is 185. What is the largest of them?
  40. 40.The digits of a two-digit number add up to 8. When the digits swap places, the number goes up by 36. What is the number?

Answer key

  1. 89
  2. 5
  3. 35
  4. 57
  5. 52
  6. 67
  7. 7
  8. 36
  9. 38
  10. 40
  11. 38
  12. 73
  13. 52
  14. 48
  15. 79
  16. 17
  17. 75
  18. 38
  19. 38
  20. 56
  21. 18
  22. 16
  23. 66
  24. 20
  25. 47
  26. 25
  27. 16
  28. 95
  29. 34
  30. 17
  31. 57
  32. 20
  33. 46
  34. 13
  35. 59
  36. 38
  37. 19
  38. 77
  39. 39
  40. 26

Free quantitative aptitude lessons, practice and worksheets at talentjr.in/quantitative-aptitude