82 51 28 20 ?

• 5 will be the answer
  as the difference of 82 and 51 is 31 and again difference of 51 and 28 is 23 proceed till last term.........after this see the difference of 31 and 23 (your previous output).which is 8 .so difference of 23 and 8 is 15(now see what number substract from 20 to get 15 afcourse 5 ..s0 5 is the result
  )
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• 82 51 28 20 5
  82-51=31 & 51-28=23 & 28-20=8
  so 31-23=8 then the next digit be 23-8=15
  20-15=5
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• 10 because 3^4+1 then 3*17 then 3^3+1
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• 9 bcoz 2^2+5=9
  
  i think 9,7, odd then 5 and 4, 2 even
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• 9 will be the answer
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• ans is 5
  diffrence bw 82-51=31
  51-28=23
  28-20=8
  20-5=15
  then 15+8=23 ,8+23=31
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• 5 20/4=5
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