45
Rule: add three times the difference of the previous two numbers:
5 to 6 is a difference of 1
Next number is 6 + 1 x 3 = 6 + 3 = 9
Next number is 9 + 3 x 3 = 9 + 9 = 18
Next number is 18 + 9 x 3 = 18 + 27 = 45
Next number is 45 + 27 x 3 = 45 + 81 = 126
etc
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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.
The next number in the sequence would be 25.
The difference between successive numbers increases by 2 at each step. 1.5 → 5 : 3.5 5 → 10.5 : 5.5 10.5 → 18 : 7.5 The next difference is thus 9.5. And the next number in the sequence is: 18 + 9.5 = 27.5
The next number in the sequence 5-7-13-31 is 69.
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.