Quants Questions: Number Series Set 15

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1. 400  240  144  86.4  51.84  31.104  ?
   A)19.2466
   B)17.2244
   C)16.8824
   D)18.6624
   E)None of these
   
   Answer

   Answer – D)18.6624
   Explanation :Multiply by 0.6
   
   
   
2. 4    6    9    13.5    20.25   30.375   ?
   A)40.25
   B)45.5625
   C)42.7525
   D)48.5625
   E)None of these
   
   Answer

   Answer – B)45.5625
   Explanation :Multiply by 3/2
   
   
   
3. 9  4.5  4.5  6.75  13.5  33.75  ?
   A)101.25
   B)99.75
   C)105.50
   D)103.75
   E)None of these
   
   Answer

   Answer – A)101.25
   Explanation :
   9 *1/2=4.5
   4.5*1=4.5
   4.5*3/2=6.75
   6.75*2=13.5
   1.5*5/2=33.75
   33.75*3= 101.25
   
   
   
4. 7413  7422  7440  ?  7503   7548
   A)7456
   B)7466
   C)7477
   D)7464
   E)None of these
   
   Answer

   Answer – E)None of these
   Explanation : +9,+18,+27,+36,+45
   
   
   
5. 4  8.25  17  34.75  ?
   A)42.5
   B)70.5
   C)4.5
   D)80
   E)None of these
   
   Answer

   Answer – B)70.5
   Explanation : *2+0.25, *2+0.50, *2+0.75, *2+1
   
   
   
6. 128 640 983  1199   1324   ?
   A)1541
   B)1388
   C)1642
   D)1288
   E)None of these
   
   Answer

   Answer – B)1388
   Explanation : +8^3,+7^3,+6^3,+5^3,+4^3
   
   
   
7. 828 424  220  116  ?  33 
   A)62
   B)69
   C)58
   D)64
   E)None of these
   
   Answer

   Answer – A)62
   Explanation : 828/2 +10,  424/2 +8,  220/2+6, 116/2+4
   
   
   
8. 123  366   ?   3282   9843 
   A)1867
   B)1104
   C)1467
   D)1095
   E)None of these
   
   Answer

   Answer – D)1095
   Explanation : *3-3………
   
   
   
9. 27  17   ?  4292  237.5   718.5
   A)58
   B)66
   C)84
   D)23
   E)None of these
   
   Answer

   Answer – D)23
   Explanation :
   27*0.5+0.5*7=17
   17*1+1*6=23
   23*1.5+1.5*5=42
   42*2+2*4=92
   
   
   
10. 522   1235   2661   4800   7652   11217   ?
    A)15495
    B)16208
    C)14782
    D)16991
    E)None of these
    
    Answer

    Answer – A)15495
    Explanation : +1*713, +2*713,+3*713, +4*713,+5*713, +6*713
    
    
    

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