Look at this series: 7, 10, 8, 11, 9, 12, ... What number should come next?
7
10
12
13

• 10 will be the
  ans
• 12 years agoHelpfull: Yes(4) No(1)
• Answer is 10
  These are the two series(the successive term increases by 1)
  7,8,9,___
  10,11,12
• 13 years agoHelpfull: Yes(3) No(2)
• 7+3=10, 10-2=8, 8+3=11, 11-2=9, 9+3=12, 12-2=10
  therefore ans is 10
• 7 years agoHelpfull: Yes(0) No(0)