Question

the following question, select the missing number from

Q: Answer-the following question, select the missing number from the given alternatives. 20, 340, 500, 580, [?...

The pattern followed here is as follows The difference between two consecutive numbers is halved as we move from left to right, starting from 320 between the 1st number and the 2nd number. 20 320 340 340 160 500 500 80 580 580 40 620 620 20 640 So, 620 will come in place of . The complete series is 20, 340, 500, 580, 620, 640 Hence, option b.