Quants Questions : Number System Set 4

Hello Aspirants. Welcome to Online Quantitative Aptitude Section with explanation in AffairsCloud.com. Here we are creating question sample in Number System, which is common for all the competitive exams. We have included Some questions that are repeatedly asked in bank exams !!

1. When a number is subtracted from the number 8,12 and 20, the remainders are in continued proportion, Find the number ?
   A)3
   B)4
   C)2
   D)6
   
   Answer

   B)4
   Explanation :
   8-x / 12 –x = 12-x /20 –x
   (8-x)(20-x) = (12 – x)(12 –x )
   160 – 8x – 20x + x² = 144 – 12x – 12x + x²
   4x = 16
   x = 4
   
   
    
2. Sum of the three consecutive number is 1956. What is 23% of the highest number ?
   A)150.19
   B)105.19
   C)159.50
   D)150.50
   
   Answer

   A)150.19
   Explanation :
   X+x+1+x+2 = 1956
   3x = 1956 – 3 = 1953
   X = 1953/3 = 651
   X+3 = 653
   23% of largest num = 23*653/100 = 150.19
   
   
   
3. If the numerator of a fraction is increased by 100% and the denominator is increased by 200%. The resultant fraction is 1 (1/15), What was the original fraction ?
   A)1(4/3)
   B)1(5/3)
   C)1(3/5)
   D)1(3/2)
   
   Answer

   C)1(3/5)
   Explanation :
   1(1/15) = 16/15
   X+x/y+2y = 16/15
   2x/3y = 16/15
   x/y = (16*3) / (15*2) = 8/5 = 1(3/5)
   
   
   
4. Which of the following number is divisible by 11 ?
   A)29435417
   B)29435477
   C)57463822
   D)57648317
   
   Answer

   A)29435417
   Explanation :(9+3+4+7) – (2+4+5+1) = 11
   
   
   
5. The sum of square of 2 number is 1972 and the difference of their square is 620. Find the number ?
   A)33,26
   B)34,25
   C)36,26
   D)38,28
   
   Answer

   C)36,26
   Explanation :
   X²+y² = 1972
   X² – y² = 620
   Solve ths
   2x² = 2592
   x² = 1296
   x = 36
   y² = 1972 – 1296
   y² = 676
   y = 26
   
   
   
6. Product of one fourth of the number  and 120% of another number is what % of the product of the original number ?
   A)35%
   B)23%
   C)32%
   D)30%
   
   Answer

   D)30%
   Explanation :
   x/4 = one fourth of the no
   120y/100 = another no = 6y/5
   % = [(x/4 * 6y/5)*100] / xy
   = 600/20 = 30%
   
   
   
7. Find the 5 digit number, 5^th digit is one fourth of the 3^rd digit and one half of the 4^th digit. 3rd digit is one half of the 1^st digit. 2^nd digit is 5 more than the 5^th digit.
   A)12786
   B)86421
   C)46218
   D)24675
   
   Answer

   B)86421
   Explanation :
   5^th digit – 1
   Second – 1+5 = 6
   Third = 4
   Four = 2
   First = 4*2 =8
   
   
   
8. What is the no of zeroes at the end of the product of the no from1 to 100 ?
   A)20
   B)22
   C)24
   D)25
   
   Answer

   C)24
   Explanation :100/5 + 100/25 = 20+4 = 24
   
   
   
9. x+y = 8  and x/y = 7 ,find y
   A)1
   B)2
   C)3
   D)5
   
   Answer

   A)1
   Explanation :
   7y+y = 4
   8y = 8
   Y = 1
   
   
   
10. If three numbers are added in pairs, the sums equal to 11,16 and 23.Find the three numbers
    A)8,6,16
    B)9,2,14
    C)9,5,14
    D)7,2,8
    
    Answer

    B)9,2,14
    Explanation :
    X+y = 11
    Y+z = 16
    Z+x = 23
    X+y+z = 25
    X = 25 – 16 = 9
    y = 25 – 23 = 2
    z = 25 – 11 = 14