28Jun, 2020
Quantitative Aptitude: Number Series Set 132

Directions: The following number series are based on a certain pattern. One number out of all is incorrect and does not follow the pattern. Find that odd one out.

  1. 1, 10, 63, 699, 9139
    1
    10
    63
    699
    9139
    Option D
    1 * 5 +5 = 10
    10*7 -7 = 63
    63 *11+11=704
    704*13-13=9139

     

  2. 107, 423, 955, 1709 , 2660
    107
    423
    955
    1709
    2660
    Option E
    102 – 12 + 23 =107
    202 – 22 + 33 = 423
    302 – 32 + 43 = 955
    402 –42 + 53 = 1709
    502 – 52 + 63= 2691(not2660)

     

  3. 14, 31, 65, 130, 269
    14
    31
    65
    130
    269
    Option D
    2*14 +3 = 31
    2* 31 +3= 65
    2*65+3= 133(not 130)
    2* 133 +3=269

     

  4. 7, 10, 10, 5, -5, -28
    7
    10
    5
    -5
    -28
    Option D
    7+ 4^2 – 3^2 – 2^2 = 10
    10+ 5^2 – 4^2 – 3^2 =10
    5+ 6^2 – 5^2 – 4^2 = 5
    5+ 7^2 – 6^2 – 5^2 = -7(not -5)
    -7+ 8^2- 7^2- 6^2 = -28

     

  5. 0, 28, 180, 648, 1520
    0
    28
    180
    648
    1520
    Option E
    1^3+ 3^3+0 = 28
    3^3 + 5^3 +28= 180
    5^3 + 7^3 +180= 648
    7^3 + 9^3 +648= 1720 (not 1520)

     

  6. 200,190,156, 82 ,10, -338
    200
    190
    156
    82
    10
    Option E
    200- (12 + 32 ) = 190
    190 – (32 + 52 ) = 156
    1 56 –(52 + 72 ) = 82
    82 –( 72 + 92 ) = -48(not 10)
    -48 – (112 +1 32 ) = -338

     

  7. 60 , 66 , 110 , 198, 264
    60
    66
    110
    198
    264
    Option C
    60 + 6= 66
    60+ 66+6=132 (not 110)
    60+ 132+6= 198
    60+198+6= 264

     

  8. 20.5, 26.5, 29.5 , 19.5, 26.5
    20.5
    26.5
    29.5
    19.5
    26.6
    Option C
    20.5 + 7.5 – 1.5= 26.5
    26.5 + 5.5 – 2.5=29.5
    29.5+ 3.5 -3.5 = 29.5 (not 19.5)
    29.5 +1.5 – 4.5= 26.5

     

  9. 84, 42.5, 41, 42.5, 17, 36.5
    84
    42.5
    41
    42.5
    17
    Option D
    84/2 +0.5 = 42.5
    42.5 -1.5 = 41
    84/2 +0.5 = 42.5
    41/2 -3.5 = 17
    84/2 +0.5 = 42.5(not 36.5)

     

  10. 2, 12 , 8 , 6, 512, 4
    2
    12
    8
    6
    4
    Option E
    Odd place number = triple of previous odd place number
    Even place number = half of previous even place number