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Quantitative Aptitude

NUMBER SERIES MCQs

Number Theory

Total Questions : 166 | Page 5 of 17 pages
Question 41. (11^2 + 12^2 + 13^2 + ... + 20^2) = ?
  1.    385
  2.    2485
  3.    2870
  4.    3255
 Discuss Question
Answer: Option B. -> 2485
Answer: (b).2485
Question 42. If the number 5 * 2 is divisible by 6, then * = ?
  1.    2
  2.    3
  3.    6
  4.    7
 Discuss Question
Answer: Option A. -> 2
Answer: (a).2
Question 43. On dividing 2272 as well as 875 by 3-digit number N, we get the same remainder. The sum of the digits of N is:
  1.    10
  2.    11
  3.    12
  4.    13
 Discuss Question
Answer: Option A. -> 10
Answer: (a).10
Question 44. Which of the following numbers will completely divide (49^(15) - 1) ?
  1.    8
  2.    14
  3.    46
  4.    50
 Discuss Question
Answer: Option A. -> 8
Answer: (a).8
Question 45. A boy multiplied 987 by a certain number and obtained 559981 as his answer. If in the answer both 9 are wrong and the other digits are correct, then the correct answer would be:
  1.    553681
  2.    555181
  3.    555681
  4.    556581
 Discuss Question
Answer: Option C. -> 555681
Answer: (c).555681
Question 46. How many prime numbers are less than 50 ?
  1.    16
  2.    15
  3.    14
  4.    18
 Discuss Question
Answer: Option B. -> 15
Answer: (b).15
Question 47. When a number is divided by 13, the remainder is 11. When the same number is divided by 17, then remainder is 9. What is the number ?
  1.    339
  2.    349
  3.    369
  4.    Data inadequate
 Discuss Question
Answer: Option B. -> 349
Answer: (b).349
Question 48. (800 ÷ 64) x (1296 ÷36) = ?
  1.    420
  2.    460
  3.    500
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these
Answer: (d).None of these
Question 49. Which natural number is nearest to 8485, which is completely divisible by 75 ?
  1.    8475
  2.    8500
  3.    8550
  4.    8525
 Discuss Question
Answer: Option A. -> 8475
Answer: (a).8475
Question 50. (51 + 52 + 53 + ... + 100) = ?
  1.    2525
  2.    2975
  3.    3225
  4.    3775
 Discuss Question
Answer: Option D. -> 3775
Answer: (d).3775

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