Question : A snail is at the bottom of a 20 meters deep pit. Every day the snail climbs 5 meters upwards, but at night it slides 4 meters back downwards. How many days does it take before the snail reaches the top of the pit?
On the first day, the snail reaches a height of 5 meters and slides down 4 meters at night, and thus ends at a height of 1 meter. On the second day, he reaches 6 m., but slides back to 2 m. On the third day, he reaches 7 m., and slides back to 3 m. ... On the fifteenth day, he reaches 19 m., and slides back to 15 m. On the sixteenth day, he reaches 20 m., so now he is at the top of the pit! Conclusion: The snail reaches the top of the pit on the 16th day!... .
Net gain after a day and night transaction of the snail is 1 m after 15 days and nights it will be 15 meters then he will climb 5m the next day so 16 days
The snail will travel a metre per day since it climbs up 5 metres and slides down 4 metres.So it will travel 15 metres in 15 days.in the next day it will climb 5 metres and reach the top.
Goin by logic, at the end of day he travels just 1 m (5-4). He wil require 19 dayz to travel 19m. remianin 1m, he can complete in 1/5 days (5m = 1 day, so 1m = 1/5 day). He takes 19(1/5) days to reach top.
The answer is 20.By calculating(5-4,1+5-4,2+5-4,3+5-4,4+5-4,5+5-4.........)it reveal that each day the snail travel up to 1m therfore it will travel 20 m in 20 days.
for onday 5m climb and night 4m fall so perday only 1 m climb so for 15 days 15m th next day 5 m climb so it reaches total 20 meters now there is no need to fell down as it already reched the pit
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A number is called a palindrome when it is equal to the number you get when all its digits are reversed. For example, 2772 is a palindrome. We discovered a curious thing. We took the number 461, reversed the digits, giving the number 164, and calculated the sum of these two numbers: 461 164 + ------- 625 We repeated the process of reversing the digits and calculating the sum two more times: 625 526 + ------- 1151 1511 + ------- 2662 To our surprise, the result 2662 was a palindrome. We decided to see if this was a pure coincidence or not. So we took another 3-digit number, reversed it, which gave a larger number, and added the two. The result was not a palindrome. We repeated the process, which resulted in another 3-digit number which was still not a palindrome. We had to repeat the process twice more to finally arrive at a 4-digit number which was a palindrome. What was the 3-digit number we started with the second time?
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Greengrocer C. Carrot wants to expose his oranges neatly for sale. Doing this he discovers that one orange is left over when he places them in groups of three. The same happens if he tries to place them in groups of 5, 7, or 9 oranges. Only when he makes groups of 11 oranges, it fits exactly. How many oranges does the greengrocer have at least?
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