Insert the missing number
17, 7, 24, 19, 9, 28, ..., 8, 31
A. 20 B. 21
C. 18 D. 23

• 17+7=24
  19+9=28
  x+8=31
  therefore x=23
• 13 years agoHelpfull: Yes(15) No(0)
• add first two get 3rd no as result ie..,17+7=24
  add next two 4,5 numbers ie..,19+9=28 is 6th number
  similarly to get 31 we have to add 23 to 8 so ans is 23
• 13 years agoHelpfull: Yes(2) No(0)
• 17+7=24, 19+9=28, X+8=31,
  and the difference betweeen 24 and 19 is 5, so here also the difference between 28 and x is 5 the answer is 23
• 12 years agoHelpfull: Yes(1) No(0)
• ans: c 23
  
  17, 7, 24, 19, 9, 28, .23., 8, 31
  diff: -10 17 -5 -10 19 -5 -15 23
• 12 years agoHelpfull: Yes(0) No(1)