Look at this series: 7, 10, 8, 11, 9, 12, … What number should come next? Ans :-
a.( 13 ) b.( 10 ) c. ( 14 ) d.( 16 )

• Solution : b.(10)
  Explaina : In the sequence, we have two series. first series starting with 7 and second starting with 10. after that n+1 procedure as follows as per series.
  ie., 7 = 7
  10 = 10
  7 +1 = 8
  10 +1 = 11
  8 +1 = 9
  11 +1 = 12
  9 +1 = 10.
• 13 years agoHelpfull: Yes(14) No(2)
• Its simple easy
  +3, -2 alternate terms :)
  example : 7+3=10, 10-2=8. ... goes on
  So answer is b) 10
• 12 years agoHelpfull: Yes(10) No(0)
• b.( 10 )
  
  there are two series...
  7,8,9,10
  and
  10,11,12,13
• 13 years agoHelpfull: Yes(4) No(1)
• the pattern followed is increase by 3 and decrease by 2 so the next no should be decresed by 2 means 12-2=10
• 10 years agoHelpfull: Yes(3) No(1)
• Adding 3,then subtracting 2
  7+3=10, 10-2=8, 8+3=11, 11-2=9, 9+3=12,12-2=10,….
  
• 10 years agoHelpfull: Yes(3) No(1)
• B. 10
  
  7 to 10=3 increase
  10 to 8=2 decrease
  8 to 11=3 increase
  11 to 9=2 decrease
  9 to 12=3 increase
  
  So 12 to 10= 2 decrease
• 10 years agoHelpfull: Yes(1) No(0)
• --+3 and -2 ans 10
• 10 years agoHelpfull: Yes(1) No(1)
• 10
  alternative series
• 10 years agoHelpfull: Yes(0) No(0)
• b.10
  first ,third,fifth...7,8,9,(10)
  second fourth,sixth....10,11,12,13
• 10 years agoHelpfull: Yes(0) No(0)
• series is incrementing by 3 and decrementing by 2
  
• 9 years agoHelpfull: Yes(0) No(0)
• 10
  12-2=10
• 8 years agoHelpfull: Yes(0) No(0)
• 7
  7+3=10
  10-2=8
  8+3=11
  11-2=9
  9+3=12
  12-2=10
• 7 years agoHelpfull: Yes(0) No(0)
• ans -
  In series we see that there is first addition (+) 3 and then subtraction of (-) 2 and its vice versa.Lastly you see there is a subtraction of (-) 2 required.
• 6 years agoHelpfull: Yes(0) No(0)