Q: What is the logic behind number sequence 4 - 5 - 9 - 18 - 34?

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The nest number in the sequence is 18. Note that the difference between each number and the next number in the sequence follows the simple sequence of 1,2,3,4. Obviously the next in the sequence of increases is 5, so 13+5=18.

-18 then -27

183 + 1 = 44 + 2 = 66 + 3 = 99 + 4 = 13Etc. The next number in the sequence would be 18, then 25, and so on.Ans 2.The previous answer contains an error.The next number in the sequence would be 18 (13 + 5),after which comes 24 (18 + 6 ) not 25.

This is an arithmetic sequence with t1 = 1 and the common difference d = -18.The nth term of an arithmetic sequence is given by the formula:tn = t1 + (n - 1)d (substitute 10 for n, 1 for t1, and -18 for d)t10 = 1 + (10 - 1)(-18) = 1 + 9(-18) = 1 - 162 = -161Thus the 10th number of the sequence is -161.

18

Related questions

The nest number in the sequence is 18. Note that the difference between each number and the next number in the sequence follows the simple sequence of 1,2,3,4. Obviously the next in the sequence of increases is 5, so 13+5=18.

133514221125715124 is a single 18-digit number. A single number cannot define a sequence.

18

Every next number is increased by 5. The next number in the sequence is 23.

961526412

The next number in the sequence is... 360.

The next number could be 26 The next number could be 12 - - - - - - - - - The next number that is in the sequence is 12.

25 is the next number that appears in that sequence.

-18 then -27

The next number in the sequence is 18. It's +1, +2, +3, +4, ....

The next number is 0

The difference between the numbers is increasing by 2 every time. Therefore, 18 + 9.5 = 27.5 is the next number in the sequence.