What is the next number of the following sequence.

1) 3 15 35 3 ?

2) 2 4 12 48 ?

3) 10 7 12 10 14 ?

• 1) Wrong Question... The Question is 3, 15, 35, 63, x
  2^2 - 1 = 3
  4^2 - 1 = 15
  6^2 - 1 = 35
  8^2 - 1 = 63
  10^2 - 1 = 99
  Ans : 99
  
  2) 2, 4, 12, 48, x
  2 * 2 = 4
  4 * 3 = 12
  12 * 4 = 48
  48 * 5 = 240
  Ans : 240
  
  3) 10, 7, 12 , 10, 14, x
  10 - 3 = 7... 7 + 5 = 12
  12 - 2 = 10.. 10 + 4 = 14
  14 - 1 = 13
  Ans : 13
  
  
• 10 years agoHelpfull: Yes(37) No(2)
• 3) 13
  10-3=7 7+5=12 12-2=10 10+4=14 14-1=13
• 10 years agoHelpfull: Yes(4) No(1)
• 2)2*2=4
  4*3=12
  12*4=48
  48*5=240
  3)10+2=12,12+2=14
  7+3=10,10+3=13
  
  
• 10 years agoHelpfull: Yes(3) No(0)
• 2)ans:240
  2*2=4
  4*3=12
  12*4=48
  48*5=240
  
• 10 years agoHelpfull: Yes(1) No(0)
• 3)10,7,12,10,14,x
  =>(10,12,14)(7,10,x)
  10+2=12,12+2=14
  7+3=10
  10+3=13
  so x=13
• 10 years agoHelpfull: Yes(1) No(0)
• 1)9*11=99
  2)48*5=240
  
• 10 years agoHelpfull: Yes(0) No(1)
• for that last question ans:
  see alternate like 10+2=12;12+2=14;14+2=16 .. and 7+3=10;10+3=13;13+3=16 ..
• 9 years agoHelpfull: Yes(0) No(0)
• 2) 2*2=4
  4*3=12
  12*4=48
  48*5=240
  ans:240
  3) the difference between two no's in the series are -3,+5,-2,+4. hence the next will be -1(compare with alternate no's). 14-1=13
  ans:13
  
• 9 years agoHelpfull: Yes(0) No(0)
• 1.55
  2.24
  3.13
• 9 years agoHelpfull: Yes(0) No(1)
• 2)
  2*2=4
  4*3=12
  12*4=48
  so next number is 48*5=240
  
  3)
  10-3=7
  7+5=12
  12-2=10
  10+4=14
  so next number is 14-1=13
• 9 years agoHelpfull: Yes(0) No(0)