25,13,39,17,51,19,57,15,45,?

• 25-13=12
  39-17=22
  51-19=32
  57-15=42
  45-x=52 so
  x= -7 ans
• 11 years agoHelpfull: Yes(78) No(0)
• 25-13=12....... 13*3=39
  39-17=22......17*3=51
  51-19=32.......19*3=57
  57-15=42.......15*3=45
  45-x=52 nd x=7 den 7*3=21 so next term is 7 den 21 nd so on...
• 11 years agoHelpfull: Yes(6) No(5)
• here this series can be divided as (13,15,17,19,25) and (39,45,51,57).the 2nd part is thrice of the 1st part..so next num will be 25*3=75
• 11 years agoHelpfull: Yes(2) No(12)
• 13+4=17
  17+2=19
  19-4=15
  15-2=13
• 11 years agoHelpfull: Yes(2) No(1)
• ans-135
  
  
• 11 years agoHelpfull: Yes(1) No(5)
• 25-13 = 12
  12*3 = 39
  39-17 = 22
  17*3 = 51, So, same correlation will be followed throughout and answer is -7.
  
• 11 years agoHelpfull: Yes(1) No(4)
• differnce between 1st and 2nd ,3rd and 4th,5th and 6th ,7th and 8th are 12,22,32,42 respectively.so diff. between 9th and 10th will be 52
  that means 45-52=-7
• 11 years agoHelpfull: Yes(1) No(0)
• divide the nos into grp of 5 nos.
  3,5,2,3.5,7
  here,3+2=5,2+1.5=3.5,3.5*2=7
  again,4+2=6,3+1.5=4.5,4.5*2=9
  the next grp would be,
  1.5,..... , 1.5+2=3.5
• 11 years agoHelpfull: Yes(0) No(0)
• Can someone...tell me the correct ans..
• 11 years agoHelpfull: Yes(0) No(0)
• correct answer is -7
• 8 years agoHelpfull: Yes(0) No(0)
• dds gfdsgs
• 7 years agoHelpfull: Yes(0) No(0)