# 40 , 20 , 35 , 25 , 30 , 30 , ? , ...................................... and so on

2
by 1209

2016-02-17T14:28:07+05:30

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Hello !
40 , 20 , 35 , 25 , 30 , 30 , 25 , 35 , 20 , 40 , 15 , 45 ................. and so on.
Explanation :
This an alternating addition and subtracting series .
5 is subtracted from the first number and then it is added to the next number in order to obtain the next two number and this continues.
I hope my logic is correct !
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Thank you!
2016-02-17T14:41:01+05:30

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
40 , 20 , 35 , 25 , 30 , 30 ,
In this series, there is a relation between the 1st and 3rd number , and the 2nd and 4th number. If observed carefully a pattern emerges.

1st   |  3rd   |  5th

40 , 35 , 30
40 , (40 - 5) = 35 , (35 - 5) = 30.....

2nd  |  4th  |  6th

20 , 25 , 30
20 , (20 + 5) = 25 , (25 + 5) = 30

40 , 20 , 35 , 25 , 30 , 30 , (30 - 5) , (30 + 5) , ..... and so on

40,
20, 35, 25, 30, 30, 25, 35, 20, 40

Suprisingly, the series of -5 and +5 makes a number series. It starts with 40 and ends with 40. 40 is subtracted until it reaches to the lowest number in the series: 20. 20 is added until it reaches to the greatest number in the series: 40.