1 2 5 12 27 58 121 ?

• 2*2+1=5
  5*2+2=12
  12*2+3=27
  .
  .
  121*2+6=248
• 8 years agoHelpfull: Yes(11) No(0)
• 
  1
  2=1*2+0
  5=2*2+1
  12=5*2+2
  27=12*2+3
  58=27*2+4
  121=58*2+5
  121*2+6=248
• 8 years agoHelpfull: Yes(6) No(0)
• 1*1+1=2
  2*2+1=5
  5*2+2=12
  12*2+3=27
  27*2+4=58
  58*2+5=121
  121*2+6=248
• 8 years agoHelpfull: Yes(2) No(0)
• 1
  2=1*2+0
  5=2*2+1
  12=5*2+2
  27=12*2+3
  58=27*2+4
  121=58*2+5 i.e. t(n)=t(n-1)*2+(n-2)
  so next term will be 121*2+6=248
• 8 years agoHelpfull: Yes(0) No(0)
• 248
  
  1*2+0=2 2*2+1=5 5*2+3=12......121*2+6=248
• 8 years agoHelpfull: Yes(0) No(0)
• 1
  2=1*2+0
  5=2*2+1
  12=5*2+2
  27=12*2+3
  58=27*2+4
  121=58*2+5
  ANs= 121*2+6=248
• 8 years agoHelpfull: Yes(0) No(0)
• 1*2+0=2
  2*2+1=5
  5*2+2=12
  12*2+3=27
  27*2+4=58
  58*2+5=121
  121*2+6=248
• 8 years agoHelpfull: Yes(0) No(0)
• 1
  1*2+0=2
  2*2+1=4+1=5
  5*2+2=10+2=12
  12*2+3=24+3=27
  27*2+4=54+4=58
  58*2+5=116+5=121
  121*2+6=242+6=248
• 6 years agoHelpfull: Yes(0) No(0)
• 2^1-1=1
  2^2-2=2
  2^3-3=5
  2^4-4=12
  2^5-5=27
  2^6-6=58
  2^7-7=121
  2^8-8=248
• 6 years agoHelpfull: Yes(0) No(0)
• 1×2=2
  2×2+1=5
  5×2+2=12
  12×3+3=27
  27×2+4=58
  58×2+5=121
• 6 years agoHelpfull: Yes(0) No(0)
• 1,2,5,12,27,58,121,248
  Calculate difference between no's
  1,3,7,15,31,63,127
  Again calculate the difference
  2,4,8,16,32,64
  So, now add 64 +127=248
• 6 years agoHelpfull: Yes(0) No(0)
• 248 is the answer....
  
  number+number+1...
  then number+number+2...
  the number+number+3...
  1+1=2
  2+2+1=5
  5+5+2=12
  12+12+3=27
  27+27+4=58
  58+58+5=121
  121+121+6=248
• 6 years agoHelpfull: Yes(0) No(0)