Direction for the questions 1 to 4: Find the missing term in the series.
80, 370, ? , 1550, 2440, 3530

a. 900
b. 840
c. 750
d. 860

• 10^2-20=80
  20^2-30=370
  30^2-40=960
  40^2-50=1550
  50^2-60=2440
  60^2-70=3530
• 5 years agoHelpfull: Yes(11) No(5)
• opt D
  because 370-90=290
  2440-1550=890
  3530-2440=1090
  
  370+490=860
  so option D
• 6 years agoHelpfull: Yes(7) No(4)
• 80+290=370
  370+490=860
  860+690=1550
  1550+890=2440
  2440+1090=3530
  so the answer is option c)860..
• 6 years agoHelpfull: Yes(3) No(0)
• The answer will be 860
  
  because there is a gap of 290 then +200 then +200 ....and so on
  
  the series goes like this ..
  
  the gap between 80 ans 370 is 290
  the gap between 370 and 860 is 490
  the gap between 860 and 1550 is 690
  the gap between 1550 and 2440 is 890
  the gap between 2440 and 3530 is 1090
• 5 years agoHelpfull: Yes(1) No(1)
• it's d. 860.. Because 80+290=370
  370+290+200=860
  860+290+200+200=1550
  1550+290+200+200+200=2440
  2440+290+200+200+200+200=3530
• 5 years agoHelpfull: Yes(1) No(0)
• Simple logic!!
  80(nearest 100)= 100-80=20
  next 370 (nearest 400)=400-370=30
  next difference should be 40!!
  Therefore see the option d. 860(nearest 900|)=900-860=40
• 5 years agoHelpfull: Yes(1) No(0)
• D) Answer
  80, 370 (860) , 1550 , 2440, 3530
  
  subtraction is: 290 490 690 890 1090
  
  Answer is: 1550-690=(860)
• 4 years agoHelpfull: Yes(1) No(0)
• 80,310,?,1550,2440,3530
  310-90=290,3530-2440=890,290-890=690,1550-690=860.so option D
• 4 years agoHelpfull: Yes(0) No(0)
• 100-20=80
  400-30=370
  900-40=860
  1600-50=1550
• 4 years agoHelpfull: Yes(0) No(0)
• 860 ctc ans
  10^2-20=80
  20^2-30=370
  30^2-40=860
• 4 years agoHelpfull: Yes(0) No(0)
• d
  i dont know
• 3 years agoHelpfull: Yes(0) No(1)