2
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This sequence is based on prime numbers

Hint 1:

All the Primes have only two digits.

16, 17, 11, 16, 10, 8, 13, 7, 14, 8, 

11, 7, 5, 10, 4, 11, 5, 10, ?, ?, ?

What are the final three numbers?

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4
  • $\begingroup$ Are they all different? $\endgroup$ Jun 6, 2019 at 11:19
  • $\begingroup$ Yes............. $\endgroup$
    – Uvc
    Jun 6, 2019 at 11:23
  • $\begingroup$ So somehow they represent the 21 two-digit primes, three of them missing. $\endgroup$ Jun 6, 2019 at 13:34
  • $\begingroup$ That’s right!... $\endgroup$
    – Uvc
    Jun 6, 2019 at 14:44

1 Answer 1

4
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The 3 missing numbers are

8, 4, 2

The Sequence is

the Cross sum of the 21 2-digits Prime numbers in Reverse Order
97 is 16, 89 is 17, 83 is 11 and so on until 17 is 8, 13 is 4 and 11 is 2

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1
  • $\begingroup$ Excellent,,,..got it...SOD(Sum of Digits) series starting from the normal order can be found in oeis..usually reverse series are not usually found. $\endgroup$
    – Uvc
    Jun 6, 2019 at 21:48

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