Quants Questions : Number Series Set 8

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

1. 5, 15, 65, 315, ?
   A)1556
   B)1565
   C)1665
   D)1656
   

   Answer

   B) 1565
   Explanation :
   5*5 – 10 = 25 – 10 = 15
   15*5 -10 = 75 – 10 = 65
   65*5 – 10 = 325 – 10 = 315
   315*5 – 10 = 1575 – 10 = 1565
   
   
   
2. 460, 92, 36.8, 22.08, ?
   A)17.664
   B)18.44
   C)16.33
   D)10.56
   

   Answer

   A)17.664
   Explanation :
   460*(1/5) = 92
   92*(2/5) = 36.8
   36.8*(3/5) = 22.08
   22.08*(4/5) = 17.664
   
   
   
3. 1023, 987, 915, 807, ?
   A)563
   B)543
   C)636
   D)663
   

   Answer

   D)663
   Explanation :
   1023 – 36 = 987
   987 – 72 = 915
   915 – 108 = 807
   807 – 144 = 663
   
   
   
4. 16, 33, 69, 126, ?
   A)257
   B)246
   C)206
   D)298
   

   Answer

   C)206
   Explanation :
   16+(16*1+1) = 16+17 = 33
   33+(17*2+2) = 33 + 36 = 69
   69+(18*3+3) = 69+57 = 126
   126+(19*4+4) = 126+ 80 = 206
   
   
   
5. 76, 517, 878, 1167, ?
   A)1392
   B)1932
   C)1832
   D)1672
   

   Answer

   A)1392
   Explanation :
   76 + 21^2 = 76+441 = 517
   517 + 19^2 = 517+361 =878
   878 + 17^2 = 878 + 289 = 1167
   1167 + 15^2 = 1167 + 225 = 1392
   
   
   
6. 300, 150, 90, 63, ?
   A)54.5
   B)45.6
   C)50.4
   D)34.6
   

   Answer

   C)50.4
   Explanation :
   300*0.5 = 150
   150*0.6 = 90
   90*0.7 = 63
   63*0.8 = 50.4
   
   
   
7. 8, 4, 4, 6, 12, ?
   A)39
   B)27
   C)24
   D)30
   

   Answer

   D)30
   Explanation :
   8*(1/2) = 4
   4*(1) = 4
   4*(3/2) = 6
   6*(2) = 12
   12*(5/2) = 30
   
   
   
8. 69, 77.28, 86.55, 96.936, ?
   A)102.546
   B)108.568
   C)105.675
   D)119.876
   

   Answer

   B)108.568
   Explanation :
   69 + (12*69/100) = 69 + 8.28 = 77.28
   77.28 + (12*77.28/100) = 77.28 + 9.27 = 86.55
   86.55 + (12*86.55/100) = 86.55 +10.386 = 96.936
   96.936 + 11.632 = 108.568
   
   
   
9. 980, 147, 28, 11, 8.57, ?
   A)12.653
   B)10.765
   C)8.224
   D)5.675
   

   Answer

   C)8.224
   Explanation :
   980/7 + 7 = 147
   147/7 +7 = 28
   28/7 + 7 = 11
   11/7 + 7 = 8.57
   8.57 /7 +7 = 8.224
   
   
   
10. 15, 32, 14, 30, 13, ?
    A)17
    B)26
    C)43
    D)28
    

    Answer

    D)28
    Explanation :
    15*2 + 2 = 30+2 = 32
    32/2 – 2 = 14
    14*2+2 = 30
    30/2-2 = 13
    13*2+2 = 28