49,39,37,33,26,15,?

• ans is 16
  49-37=12
  37-26=11
  26-16=10
• 11 years agoHelpfull: Yes(17) No(12)
• I think it is -1? pls correct it if i wrong
• 10 years agoHelpfull: Yes(3) No(4)
• how it is -1 can u explain me.
• 7 years agoHelpfull: Yes(0) No(0)