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Quantitative Aptitude

NUMBER SERIES MCQs

Number Theory

Total Questions : 166 | Page 1 of 17 pages
Question 1. Which one of the following is not a prime number?
  1.    31
  2.    61
  3.    71
  4.    91
 Discuss Question
Answer: Option D. -> 91
Answer: (d).91
Question 2. (112 x 5^4) = ?
  1.    67000
  2.    70000
  3.    76500
  4.    77200
 Discuss Question
Answer: Option B. -> 70000
Answer: (b).70000
Question 3. 1397 x 1397 = ?
  1.    1951609
  2.    1981709
  3.    18362619
  4.    2031719
 Discuss Question
Answer: Option A. -> 1951609
Answer: (a).1951609
Question 4. What least number must be added to 1056, so that the sum is completely divisible by 23 ?
  1.    2
  2.    3
  3.    18
  4.    21
 Discuss Question
Answer: Option A. -> 2
Answer: (a).2
Question 5. It is being given that (2^32 + 1) is completely divisible by a whole number. Which of the following numbers is completely divisible by this number?
  1.    (2^16 + 1)
  2.    (2^16 - 1)
  3.    (7 x 2^23)
  4.    (2^96 + 1)
 Discuss Question
Answer: Option D. -> (2^96 + 1)
Answer: (d).(2^96 + 1)
Question 6. 397 x 397 + 104 x 104 + 2 x 397 x 104 = ?
  1.    250001
  2.    251001
  3.    260101
  4.    261001
 Discuss Question
Answer: Option B. -> 251001
Answer: (b).251001
Question 7. Which one of the following numbers is completely divisible by 45?
  1.    181560
  2.    331145
  3.    202860
  4.    2033555
 Discuss Question
Answer: Option C. -> 202860
Answer: (c).202860
Question 8. Which of the following numbers will completely divide (3^25 + 3^26 + 3^27 + 3^28) ?
  1.    11
  2.    16
  3.    25
  4.    30
 Discuss Question
Answer: Option D. -> 30
Answer: (d).30
Question 9. (x^n - a^n) is completely divisible by (x - a), when
  1.    n is any natural number
  2.    n is an even natural number
  3.    n is and odd natural number
  4.    n is prime
 Discuss Question
Answer: Option A. -> n is any natural number
Answer: (a).n is any natural number
Question 10. (35423 + 7164 + 41720) - (317 x 89) = ?
  1.    28213
  2.    84307
  3.    50694
  4.    56094
 Discuss Question
Answer: Option D. -> 56094
Answer: (d).56094

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