← Number problems lesson New set →

Number Problems Worksheet

Quantitative aptitude lesson 27: Number problems · Set 945 · 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 8. When the digits swap places, the number goes up by 18. What is the number?
  2. 2.The sum of 4 consecutive odd numbers is 336. What is the smallest of them?
  3. 3.The sum of 3 consecutive numbers is 30. What is the smallest of them?
  4. 4.One number is 5 times another. Their difference is 108. What is the smaller number?
  5. 5.The sum of two numbers is 131 and their difference is 31. What is the smaller number?
  6. 6.The sum of two numbers is 37 and their difference is 25. What is the smaller number?
  7. 7.The sum of 3 consecutive numbers is 72. What is the smallest of them?
  8. 8.The sum of two numbers is 142 and their difference is 6. What is the smaller number?
  9. 9.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?
  10. 10.The sum of 5 consecutive numbers is 235. What is the smallest of them?
  11. 11.The digits of a two-digit number add up to 12. When the digits swap places, the number goes up by 36. What is the number?
  12. 12.The sum of 4 consecutive odd numbers is 136. What is the smallest of them?
  13. 13.One number is 4 times another. Their difference is 78. What is the smaller number?
  14. 14.The sum of two numbers is 78 and their difference is 30. What is the smaller number?
  15. 15.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?
  16. 16.The sum of 5 consecutive numbers is 65. What is the largest of them?
  17. 17.The sum of two numbers is 133 and their difference is 39. What is the larger number?
  18. 18.One number is 3 times another. Their difference is 26. What is the smaller number?
  19. 19.The sum of 5 consecutive numbers is 230. What is the largest of them?
  20. 20.One number is 2 times another. Their difference is 36. What is the smaller number?
  21. 21.The digits of a two-digit number add up to 14. When the digits swap places, the number goes up by 36. What is the number?
  22. 22.The sum of two numbers is 71 and their difference is 17. What is the larger number?
  23. 23.The sum of two numbers is 66 and their difference is 34. What is the smaller number?
  24. 24.The sum of 4 consecutive numbers is 106. What is the smallest of them?
  25. 25.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?
  26. 26.One number is 5 times another. Their difference is 16. What is the smaller number?
  27. 27.The sum of 5 consecutive numbers is 200. What is the smallest of them?
  28. 28.The sum of 3 consecutive even numbers is 54. What is the largest of them?
  29. 29.The sum of 4 consecutive numbers is 58. What is the smallest of them?
  30. 30.The sum of two numbers is 23 and their difference is 17. What is the smaller number?
  31. 31.One number is 3 times another. Their difference is 44. What is the smaller number?
  32. 32.The sum of 3 consecutive odd numbers is 153. What is the largest of them?
  33. 33.One number is 3 times another. Their difference is 36. What is the smaller number?
  34. 34.One number is 4 times another. Their difference is 75. What is the smaller number?
  35. 35.The digits of a two-digit number add up to 14. When the digits swap places, the number goes up by 18. What is the number?
  36. 36.The sum of 4 consecutive odd numbers is 240. What is the smallest of them?
  37. 37.The sum of 3 consecutive odd numbers is 219. What is the smallest of them?
  38. 38.The sum of 3 consecutive odd numbers is 207. What is the smallest of them?
  39. 39.The sum of 3 consecutive numbers is 129. What is the largest of them?
  40. 40.The sum of 5 consecutive numbers is 130. What is the largest of them?

Answer key

  1. 35
  2. 81
  3. 9
  4. 27
  5. 50
  6. 6
  7. 23
  8. 68
  9. 89
  10. 45
  11. 48
  12. 31
  13. 26
  14. 24
  15. 26
  16. 15
  17. 86
  18. 13
  19. 48
  20. 36
  21. 59
  22. 44
  23. 16
  24. 25
  25. 78
  26. 4
  27. 38
  28. 20
  29. 13
  30. 3
  31. 22
  32. 53
  33. 18
  34. 25
  35. 68
  36. 57
  37. 71
  38. 67
  39. 44
  40. 28

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