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Polaris Maths Aptitude Interview Question

Polaris Maths Aptitude Interview Question - 23 March

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

* This question was asked in polaris

For Solution : Click Here

15 comments:

  1. I believe it's 240:

    12 + 8 + 0*10 = 20
    20 + 10 + 1*10 = 40
    40 + 12 + 2*10 = 72
    72 + 14 + 3*10 = 116
    116 + 16 + 4*10 = 172
    172 + 18 + 5*10 = 240

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  2. 12 , 20 , 40 , 72 , 116 , 172
    Find Difference - 8 20 32 44 56
    Again Find Diff. - 12 12 12 12.....
    So, Add 12 to 56 = 68
    Then , Add 68 to 172 = 240

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  3. i hope it is 240
    solution: gap between the given series is +8,+20,+32,+44,+56,+68 and again the b/w these series is +12 finally answer is 240

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  4. its 240 theres difference of 8,20,32,44,56 wic r in AP wit CD 12 so next is 68 ie wen it added to 172 it is 240.........

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  5. Abhinav SrivastavaJune 14, 2013 at 6:14 PM

    The differece between the consecutive numbers is increasing everytime by 12.

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  6. (3+0)*4=12
    (3+2)*4=20
    (5+5)*4=40
    (10+8)*4=72
    (18+11)*4=116
    (29+14)*4=172
    (43+17)*4=240

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  7. Its 240 ,

    12 + (4*2)=20

    20 + (4*5)=40

    40 + (4*8)=72

    72 + (4*11)=116

    116 + (4*14)=172

    172 + (4*17)=240

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  8. f(x) = 6x^2-10x+16, so f(7) = 240

    ReplyDelete