← Number problems lesson New set →

Number Problems Worksheet

Quantitative aptitude lesson 27: Number problems · Set 166 · 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 4 times another. Their difference is 9. What is the smaller number?
  3. 3.The sum of 3 consecutive odd numbers is 237. What is the largest of them?
  4. 4.The sum of 3 consecutive numbers is 162. What is the smallest of them?
  5. 5.One number is 4 times another. Their difference is 96. What is the smaller number?
  6. 6.The digits of a two-digit number add up to 10. When the digits swap places, the number goes up by 72. What is the number?
  7. 7.The sum of 5 consecutive numbers is 120. What is the largest of them?
  8. 8.The sum of two numbers is 91 and their difference is 33. What is the larger number?
  9. 9.The sum of 3 consecutive numbers is 81. What is the smallest of them?
  10. 10.The sum of 4 consecutive numbers is 82. What is the smallest of them?
  11. 11.The sum of 3 consecutive numbers is 75. What is the smallest of them?
  12. 12.One number is 2 times another. Their difference is 16. What is the smaller number?
  13. 13.The sum of two numbers is 40 and their difference is 34. What is the larger number?
  14. 14.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?
  15. 15.The sum of 3 consecutive numbers is 78. What is the smallest of them?
  16. 16.The sum of 5 consecutive numbers is 165. What is the smallest of them?
  17. 17.The sum of 4 consecutive numbers is 118. What is the largest of them?
  18. 18.The sum of 3 consecutive numbers is 27. What is the largest of them?
  19. 19.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?
  20. 20.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?
  21. 21.The sum of 3 consecutive even numbers is 120. What is the smallest of them?
  22. 22.The sum of 4 consecutive odd numbers is 336. What is the smallest of them?
  23. 23.The sum of two numbers is 17 and their difference is 3. What is the larger number?
  24. 24.The sum of two numbers is 67 and their difference is 25. What is the smaller number?
  25. 25.The digits of a two-digit number add up to 15. When the digits swap places, the number goes up by 27. What is the number?
  26. 26.The sum of 4 consecutive numbers is 62. What is the largest of them?
  27. 27.One number is 4 times another. Their difference is 111. What is the smaller number?
  28. 28.The sum of 3 consecutive numbers is 21. What is the smallest of them?
  29. 29.The sum of two numbers is 71 and their difference is 9. What is the larger number?
  30. 30.The sum of 3 consecutive even numbers is 150. What is the largest of them?
  31. 31.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?
  32. 32.The sum of 4 consecutive odd numbers is 144. What is the largest of them?
  33. 33.The sum of 4 consecutive even numbers is 172. What is the largest of them?
  34. 34.The sum of 3 consecutive even numbers is 36. What is the smallest of them?
  35. 35.The sum of 5 consecutive numbers is 215. What is the largest of them?
  36. 36.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?
  37. 37.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?
  38. 38.The sum of 3 consecutive numbers is 153. What is the smallest of them?
  39. 39.The sum of 3 consecutive odd numbers is 243. What is the largest of them?
  40. 40.The digits of a two-digit number add up to 13. When the digits swap places, the number goes up by 45. What is the number?

Answer key

  1. 89
  2. 3
  3. 81
  4. 53
  5. 32
  6. 19
  7. 26
  8. 62
  9. 26
  10. 19
  11. 24
  12. 16
  13. 37
  14. 57
  15. 25
  16. 31
  17. 31
  18. 10
  19. 27
  20. 35
  21. 38
  22. 81
  23. 10
  24. 21
  25. 69
  26. 17
  27. 37
  28. 6
  29. 40
  30. 52
  31. 46
  32. 39
  33. 46
  34. 10
  35. 45
  36. 59
  37. 78
  38. 50
  39. 83
  40. 49

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