A snail, climbing a 20 feet high wall, climbs up 4 feet on the first day but slides down 2 feet on the second. It climbs 4 feet on the third day and slides down again 2 feet on the fourth day. If this pattern continues, how many days will it take the snail to reach the top of the wall?

• A snail climbing a 20 feet high wall, climbs up 4 feet on the first day but slides down 2 feet on the second and so on second day he climb only 2 feet and then same procedure go on consecutive days
  
  
  in 2 days he climb up 2 feet
  so in 16 day he will climb 16 feet,
  
  but on 17th day he will climb 4 feet ,so he will get the destination,so snail will 17 days take the snail to reach the top of the wall
  
  
  
• 11 years agoHelpfull: Yes(58) No(0)
• 17th day it will on the top of the wall.
  but also slide down 2 feet in 18th day
• 11 years agoHelpfull: Yes(6) No(3)
• In every 2 days snail climb up 2 feet (4 feet up and 2 feet down)
  if it reach 16 feet with many up and down it will be 16th day
  now in 17th day it climb up 4 feet which is equal to the height of the wall.
• 11 years agoHelpfull: Yes(4) No(1)
• 17....
• 11 years agoHelpfull: Yes(2) No(3)
• 17 days
  as on 16th day it will climb upto 16 feet and on the next day it will be on the top of wall.....without sliding down
• 11 years agoHelpfull: Yes(1) No(0)
• plz explain procedure
  
• 11 years agoHelpfull: Yes(0) No(4)
• It will take 17 days to climb the top of the wall !!!
• 11 years agoHelpfull: Yes(0) No(0)
• answer is 17
• 5 years agoHelpfull: Yes(0) No(0)