← Number problems lesson New set →

Number Problems Worksheet

Quantitative aptitude lesson 27: Number problems · Set 620 · 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 5. When the digits swap places, the number goes up by 27. What is the number?
  2. 2.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?
  3. 3.The sum of 4 consecutive odd numbers is 128. What is the smallest of them?
  4. 4.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?
  5. 5.The sum of 5 consecutive numbers is 290. What is the largest of them?
  6. 6.The sum of two numbers is 56 and their difference is 42. What is the larger number?
  7. 7.The sum of 5 consecutive numbers is 85. What is the largest of them?
  8. 8.The sum of 4 consecutive numbers is 186. What is the largest of them?
  9. 9.One number is 5 times another. Their difference is 124. What is the smaller number?
  10. 10.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?
  11. 11.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?
  12. 12.The sum of 3 consecutive numbers is 60. What is the smallest of them?
  13. 13.The sum of two numbers is 118 and their difference is 10. What is the smaller number?
  14. 14.The sum of 4 consecutive numbers is 246. What is the largest of them?
  15. 15.One number is 5 times another. Their difference is 108. What is the smaller number?
  16. 16.The sum of two numbers is 53 and their difference is 5. What is the larger number?
  17. 17.One number is 5 times another. Their difference is 40. What is the smaller number?
  18. 18.The sum of 4 consecutive even numbers is 36. What is the largest of them?
  19. 19.The digits of a two-digit number add up to 12. When the digits swap places, the number goes up by 54. What is the number?
  20. 20.The sum of two numbers is 106 and their difference is 90. What is the larger number?
  21. 21.The sum of 3 consecutive numbers is 147. What is the largest of them?
  22. 22.The sum of two numbers is 60 and their difference is 32. What is the larger number?
  23. 23.The sum of 3 consecutive even numbers is 228. What is the largest of them?
  24. 24.The sum of two numbers is 35 and their difference is 1. What is the larger number?
  25. 25.The sum of 3 consecutive numbers is 159. What is the largest of them?
  26. 26.The sum of two numbers is 116 and their difference is 8. What is the smaller number?
  27. 27.The sum of two numbers is 43 and their difference is 15. What is the smaller number?
  28. 28.The sum of 5 consecutive numbers is 150. What is the largest of them?
  29. 29.One number is 6 times another. Their difference is 165. What is the smaller number?
  30. 30.The sum of 5 consecutive numbers is 120. What is the largest of them?
  31. 31.One number is 6 times another. Their difference is 120. What is the smaller number?
  32. 32.One number is 4 times another. Their difference is 120. What is the smaller number?
  33. 33.One number is 3 times another. Their difference is 52. What is the smaller number?
  34. 34.The sum of 4 consecutive even numbers is 140. What is the smallest of them?
  35. 35.The sum of two numbers is 155 and their difference is 43. What is the larger number?
  36. 36.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?
  37. 37.The sum of 3 consecutive numbers is 174. What is the smallest of them?
  38. 38.The sum of 5 consecutive numbers is 220. What is the largest of them?
  39. 39.The sum of two numbers is 30 and their difference is 8. What is the smaller number?
  40. 40.The sum of two numbers is 45 and their difference is 33. What is the smaller number?

Answer key

  1. 14
  2. 36
  3. 29
  4. 89
  5. 60
  6. 49
  7. 19
  8. 48
  9. 31
  10. 57
  11. 79
  12. 19
  13. 54
  14. 63
  15. 27
  16. 29
  17. 10
  18. 12
  19. 39
  20. 98
  21. 50
  22. 46
  23. 78
  24. 18
  25. 54
  26. 54
  27. 14
  28. 32
  29. 33
  30. 26
  31. 24
  32. 40
  33. 26
  34. 32
  35. 99
  36. 46
  37. 57
  38. 46
  39. 11
  40. 6

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