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

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

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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

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I cannot understand

I didn't understand this logic.

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

I cannot understand this patter.