15625 6250 2500 1000 ? 160
a) 600 b) 400 c) 500 d) 650 e) None of these

• The answer is 400
  If we see from 160 each term is multiplied by 2.5(160*2.5)=400
  so 400 *2.5=1000,
  1000*2.5=2500 and so on
• 12 years agoHelpfull: Yes(18) No(0)
• ans is - 400
  it is G.P
  15625/6250=2.5
  6250/2500=2.5
  1000/400=2.5
  400/160=2.5
  
• 10 years agoHelpfull: Yes(11) No(1)
• 2500=(1000*2)+(1000/2)
  6250=(2500*2)+(2500/2)
  similarly (160*2)+(160/2)=400
• 7 years agoHelpfull: Yes(4) No(0)
• 15625*0.40=6250
  6250*0.40=2500
  2500*0.40=1000
  1000*0.40=400
• 8 years agoHelpfull: Yes(2) No(0)
• 400
  15625/25
  6250/25
  hence 1000/25=400
• 8 years agoHelpfull: Yes(1) No(0)
• 15625/2.5=6250
  6250/2.5=2500
  2500/2.5=1000
  1000/2.5=400
  400/2.5=160
  Therefore the ans:400
• 8 years agoHelpfull: Yes(1) No(0)
• 5^6*1=15625
  5^5*2=6250
  5^4*4=2500
  -------
  5^2*16=400**
  ---------
• 7 years agoHelpfull: Yes(0) No(0)