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Quantitative Aptitude

HCF AND LCM MCQs

Problems On Hcf And Lcm, H.C.F And L.C.M. Of Numbers, Lcm & Hcf, Hcf And Lcm

Total Questions : 1401 | Page 133 of 141 pages
Question 1321. Six belts commence tolling together and toll at intervals of 2, 4, 6, 8, 10 and 12 seconds respectively. In 30 minutes. how many times do they toll together ?
  1.    15
  2.    4
  3.    10
  4.    16
 Discuss Question
Answer: Option D. -> 16
Question 1322. Find the least multiple of 23, which when divided by 18, 21 and 24 leaves remainders 7, 10 and 13 respestively.
  1.    3024
  2.    3002
  3.    3036
  4.    3013
 Discuss Question
Answer: Option D. -> 3013
Question 1323. Find the least number which when divided by 16, 18, 20 and 2 leaves 4 as remainder in each case , but when divided by 7 leaves no. remainder
  1.    18004
  2.    18002
  3.    18000
  4.    17004
 Discuss Question
Answer: Option A. -> 18004
Question 1324. Let the leas number of six digits. which when divided by 4, 6, 10 and 15 leaves in each case the same remainder of 2 be N. The sum of the digits in N is
  1.    4
  2.    6
  3.    5
  4.    3
 Discuss Question
Answer: Option C. -> 5
Question 1325.   252 can be expressed as a product of primes as :
  1.    2 x 2 x 3 x 3 x 7
  2.    2 x 2 x 2 x 3 x 7
  3.    3 x 3 x 3 x 3 x 3 x 7
  4.    2 x 3 x 3 x 3 x 7
 Discuss Question
Answer: Option A. -> 2 x 2 x 3 x 3 x 7
Question 1326.  The H.C.F of 204, 1190 and 1445 is :
  1.    17
  2.    18
  3.    19
  4.    21
 Discuss Question
Answer: Option A. -> 17
Question 1327.  Find the highest common factor of 36 and 84
  1.    4
  2.    6
  3.    12
  4.    18
 Discuss Question
Answer: Option C. -> 12
Question 1328.  Which of the following is a pair of co-primes ?
  1.    (16, 62)
  2.    (18, 25)
  3.    (21, 35)
  4.    (23, 92)
 Discuss Question
Answer: Option B. -> (18, 25)
Question 1329.  A number n is said to be perfect if the sum of all its divisors (excluding n itself) is equal to n An example of perfect number is :
  1.    6
  2.    9
  3.    15
  4.    21
 Discuss Question
Answer: Option A. -> 6
Question 1330.  HCF of 4 x 27 x 3125, 8 x 9 x 25 x 7 & 16 x 81 x 5 x 11 x 49 is :
  1.    180
  2.    360
  3.    540
  4.    1260
 Discuss Question
Answer: Option A. -> 180

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