Q. What is the next number of the following sequence
4.2,26.0,8.9,8.4,52.0,17.8,16.8,104.0 ?

• Ans: 35.6
  
  Make a 3 term series like (4.2,26,8.9),(8.4,52,17.8),(16.8,104.0,?)
  Then see, 4.2 * 2 =8.4 which is in starting number of second term. 8.4 * 2 = 16.8 which is starting number of 3rd term...
  Like this 8.9 * 2 = 17.8 and 17.8 * 2 = 35.6
• 11 years agoHelpfull: Yes(25) No(0)
• the series is as follow:i)4.2,8.4,16.8... (x*2)that is multiply each term by 2.
  ii)26.0,52.0,104.0..that is(x*2)
  iii)8.9,17.8..that is(x*2)
  so the answer is :17.8*2=35.6
  
• 11 years agoHelpfull: Yes(2) No(0)
• The series is divided in 3 parts:
  1st part:4.2,8.4,16.8
  2nd part:26.0,52.0,104.0
  3rd part:8.9,17.8,?
  We can observe that we r getting the next number in every series by multiplying 2 to the previous number and similarly the next number of the series would be 35.6
• 11 years agoHelpfull: Yes(1) No(0)
• 4.2,26.0,8.9,8.4,52.0,17.8,16.8,104.0 ?
  4.2, 26.0, 8.9, 8.4, 52.0, 17.8, 16.8, 104.0 ?
  4.2, 26.0, 8.9, 8.4
  26.0, 8.9, 8.4, 52.0
  8.9, 8.4, 52.0, 17.8
  8.4, 52.0, 17.8, 16.8,
  52.0, 17.8, 16.8, 104.0
  17.8, 16.8, 104.0, 35.6
  We can see that every fourth number is twice the first number in the given series
  
• 11 years agoHelpfull: Yes(0) No(0)
• 4.2,26.0,8.9,8.4,52.0,17.8,16.8,104.0 ?
  this series divide in three different series
  1 series (4.2, 8.4, 16.8)
  4.2*2=8.4,
  8.4*2=16.8
  16.8*2=33.6
  2 series (26.0, 52.0,104.0)
  26.0*2=52
  52*2=104
  104*2=208
  3 series (8.9, 17.8, ?)
  8.9*2=17.8
  17.8*2=35.6
  ans 35.6
• 10 years agoHelpfull: Yes(0) No(0)