What is the next number of the following sequence
1, 2, 5, 10, 25, 50, ...?

• Multiply by 2 and 5/2 alternatively
  
  1 * 2 = 2
  2 * 5/2 = 5
  5 * 2 = 10
  10 * 5/2 = 25
  25 * 2 = 50
  50 * 5/2 = 125
  
  So Ans is 125
  
• 10 years agoHelpfull: Yes(43) No(0)
• 1 * 2 = 2 ---multiply by 2
  2 * 2 + 1 = 5 ---multiply by 2 + previous value
  5 * 2 = 10 ---multiply by 2
  10 * 2 + 5 = 25 ---multiply by 2 + previous value
  25 * 2 = 50 ---multiply by 2
  50 * 2 + 25 = 125 ---multiply by 2 + previous value
  
  So final ans is 125
  
• 10 years agoHelpfull: Yes(15) No(1)
• divide d series even places and odd places i.e
  1,5,25,...and 2,10,50...
  when we multiply 5 with numbers then next number comes
  so 25*5=125
  ans=125
• 10 years agoHelpfull: Yes(12) No(0)
• (1*2)+0=2
  (2*2)+5^0=5
  (5*2)+0=10
  (10*2)+5^1=25
  (25*2)+0=50
  (50*2)+5^2=125
• 10 years agoHelpfull: Yes(2) No(2)
• 5^0=1
  1*2=2
  5^1=5
  5*2=10
  5^2=25
  25*2=50
  5^3=125
• 10 years agoHelpfull: Yes(1) No(1)
• this series can be consider as combination of two series....
  ist is 1,5,25,x
  2nd is 2,10,50
  now in ist 1,1*5,5*5,next is 25*5=125
  as in 2nd 2,2*5,10*5
  
  
• 10 years agoHelpfull: Yes(1) No(0)
• Final Ans-->125
• 10 years agoHelpfull: Yes(0) No(0)
• 125
• 10 years agoHelpfull: Yes(0) No(0)
• 125
• 10 years agoHelpfull: Yes(0) No(0)
• ans is 125
  
• 10 years agoHelpfull: Yes(0) No(0)
• 5,25,.... 2,10,50
  1*5=5 2*5=10
  5*5=25 10*5=50
  25*5=125 50*5=250
• 10 years agoHelpfull: Yes(0) No(0)
• nitin jaiswal's solution is also correct na ?
• 10 years agoHelpfull: Yes(0) No(1)
• 125
  2/1=2
  5/2=2.5
  10/5=2
  25/10=2.5
  50/25=2
  125/50=2.5
• 10 years agoHelpfull: Yes(0) No(0)
• Answer: 125
• 10 years agoHelpfull: Yes(0) No(0)
• its so simple logic
  As it double in 10 yrs so in 10 yrs we get the interest as amount
  And another 10 yrs we get the other interest equal of amount so in 20 yrs we get the interest+interest+amount=3*(amount in started)
• 10 years agoHelpfull: Yes(0) No(1)
• In This No make Two Series
  1,5,25,125 All Are Multiplied By 5 With previous No.
  2,10,50, ll Are Multiplied By 5 With previous No.
  
  So Answer is 125
• 10 years agoHelpfull: Yes(0) No(0)
• answer is 125
• 8 years agoHelpfull: Yes(0) No(0)
• 1*5=5
  2*5=10
  5*5=25
  10*5=50
  25*5=125
• 6 years agoHelpfull: Yes(0) No(0)