← Number problems lesson New set →

Number Problems Worksheet

Quantitative aptitude lesson 27: Number problems · Set 553 · 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 5 times another. Their difference is 96. What is the smaller number?
  3. 3.The digits of a two-digit number add up to 4. When the digits swap places, the number goes up by 18. What is the number?
  4. 4.The sum of 4 consecutive odd numbers is 104. What is the smallest of them?
  5. 5.The sum of 5 consecutive numbers is 245. What is the largest of them?
  6. 6.The sum of 3 consecutive even numbers is 156. What is the smallest of them?
  7. 7.The sum of 3 consecutive odd numbers is 27. What is the smallest of them?
  8. 8.The sum of two numbers is 128 and their difference is 24. What is the larger number?
  9. 9.The sum of two numbers is 104 and their difference is 88. What is the larger number?
  10. 10.The digits of a two-digit number add up to 13. When the digits swap places, the number goes up by 27. What is the number?
  11. 11.The sum of 3 consecutive numbers is 144. What is the largest of them?
  12. 12.The sum of 3 consecutive odd numbers is 75. What is the smallest of them?
  13. 13.One number is 6 times another. Their difference is 115. What is the smaller number?
  14. 14.The digits of a two-digit number add up to 9. When the digits swap places, the number goes up by 45. What is the number?
  15. 15.The sum of 3 consecutive numbers is 66. What is the largest of them?
  16. 16.The sum of 5 consecutive numbers is 45. What is the smallest of them?
  17. 17.The sum of 4 consecutive numbers is 98. What is the smallest of them?
  18. 18.The sum of 3 consecutive numbers is 108. What is the largest of them?
  19. 19.One number is 5 times another. Their difference is 36. What is the smaller number?
  20. 20.The digits of a two-digit number add up to 10. When the digits swap places, the number goes up by 18. What is the number?
  21. 21.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?
  22. 22.The sum of 3 consecutive odd numbers is 249. What is the largest of them?
  23. 23.The sum of two numbers is 130 and their difference is 54. What is the larger number?
  24. 24.The sum of two numbers is 24 and their difference is 6. What is the smaller number?
  25. 25.The sum of 5 consecutive numbers is 175. What is the smallest of them?
  26. 26.The sum of 3 consecutive numbers is 126. What is the smallest of them?
  27. 27.One number is 5 times another. Their difference is 156. What is the smaller number?
  28. 28.One number is 4 times another. Their difference is 15. What is the smaller number?
  29. 29.The sum of two numbers is 42 and their difference is 18. What is the larger number?
  30. 30.The sum of 5 consecutive numbers is 145. What is the largest of them?
  31. 31.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?
  32. 32.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?
  33. 33.The sum of two numbers is 22 and their difference is 20. What is the smaller number?
  34. 34.The sum of 4 consecutive odd numbers is 56. What is the largest of them?
  35. 35.The sum of two numbers is 21 and their difference is 17. What is the smaller number?
  36. 36.The sum of 4 consecutive numbers is 70. What is the smallest of them?
  37. 37.The sum of 3 consecutive odd numbers is 39. What is the smallest of them?
  38. 38.The sum of 3 consecutive odd numbers is 147. What is the smallest of them?
  39. 39.The sum of two numbers is 107 and their difference is 27. What is the smaller number?
  40. 40.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?

Answer key

  1. 89
  2. 24
  3. 13
  4. 23
  5. 51
  6. 50
  7. 7
  8. 76
  9. 96
  10. 58
  11. 49
  12. 23
  13. 23
  14. 27
  15. 23
  16. 7
  17. 23
  18. 37
  19. 9
  20. 46
  21. 68
  22. 85
  23. 92
  24. 9
  25. 33
  26. 41
  27. 39
  28. 5
  29. 30
  30. 31
  31. 78
  32. 38
  33. 1
  34. 17
  35. 2
  36. 16
  37. 11
  38. 47
  39. 40
  40. 56

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