120, 315, 300, 345, ? ---- 390

• 
  120 ...... 315 ...... 300 ...... 345
  ...... 195 ...... -15 ........ 45
  ............ -210 ....... 60
  .................... 270
  
  120 ...... 315 ...... 300 ...... 345 ....... 720
  ...... 195 ...... -15 ........ 45 ....... 375
  ............ -210 ....... 60 ...... 330
  .................... 270 ..... 270
• 10 years agoHelpfull: Yes(27) No(15)
• 120+180=300 & 315+30=345 so 30*6=180 similarly 345+45=390 & 45*6=270
• 10 years agoHelpfull: Yes(12) No(17)
• Answer will be 570
  first 315...345.....390.......
  in series difference is 30,30+30/2
  so for 120....300......?
  in the series difference will 180,180+180/2 i.e 270
  so next number will be 300+270=570
  Another logic will be------
  in series 315,345,390
  difference is 30,45
  in series 120,300,?
  difference is 180=30*6
  so next will be 45*6=270
  so final result will be 300+270=570
• 10 years agoHelpfull: Yes(8) No(2)
• please let me know the correct answer
• 10 years agoHelpfull: Yes(6) No(1)
• answer is 570
  1. 120,300,----
  2. 315, 345, 390 if we do the same then
  30 30+30/2
  1. 120, 300, 570
  180 180+180/2
• 10 years agoHelpfull: Yes(3) No(4)
• 720 is the correct answer
• 8 years agoHelpfull: Yes(0) No(0)
• without option its not possible yaar
• 8 years agoHelpfull: Yes(0) No(1)