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What will come at the place of question mark ?
10, 100, 200, 310, ?

A. 430

B. 420

C. 410

D. 400

Answer: Option A

Solution(By Examveda Team)

1st term : 10
2nd term : 100 = 10+90
3rd term : 200 = 100+100
4th term : 310 = 200+110
5th Term: 430 = 310+120

Therefore, the answer is 430.


This Question Belongs to Competitive Reasoning >> Number Series Completion

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Comments ( 8 )

  1. Raunak Harode
    Raunak Harode :
    2 years ago

    100-10=90
    200-100=100
    310-200=110
    430-310=120
    We see the answer has show the every subtract no. Has differnce is plus 10 then in last we can calculate the last after 110 is 120
    Simply we can add with 310 which get 430

  2. Muhammad Abou
    Muhammad Abou :
    3 years ago

    very Exclient most help full this site

  3. Aditya Bhaty
    Aditya Bhaty :
    4 years ago

    we r given the no. 10,100,200 & 310
    the method to find the ans is to find the pattern between the given no.s
    we can see by subtracting the greater no. with its preceding no to find gaps which are [100-10=90] , [200-100=100] , [310-200=110]
    we can see the gaps are increasing by adding 10 to the last gap {NOTE: If you have studied arithmetic progressions in mathematics then you may apply the formula to directly get the ans}.
    we may come to a conclusion from the observation that the next no. will have a gap of 10 added to previous gap i.e 110 + 10.
    so the next no will come after adding 110 + 10 to its preceding no.
    therefore, 310+110+10=?
    310+120=?
    ?=430
    H.P

  4. Vikas Sharma
    Vikas Sharma :
    4 years ago

    120 kha se aaye

  5. Ahrabbijnu 95
    Ahrabbijnu 95 :
    5 years ago

    I cannot understand

  6. Sahiti G
    Sahiti G :
    6 years ago

    I didn't understand this logic.

  7. Shubhranil Dhar
    Shubhranil Dhar :
    6 years ago

    what is this
    then i also can say 10,100,200,310,400

  8. Vijay Maurya
    Vijay Maurya :
    7 years ago

    I cannot understand this patter.

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