Can you answer this simple school questions...

Hello,
Here we are with a new video. In this video we have given some intresting questions. Try to answer this.

Question 1
A light bulb is hanging in a room. Outside of the room there are three switches, of which only
one is connected to the lamp. In the starting situation, all switches are off and the bulb is not lit. If
it is allowed to check in the room only once to see if the bulb is lit or not (this is not visible from
the outside), how can you determine with which of the three switches the light bulb can be
switched on?

Answer 1
To find the correct switch (1, 2 or 3), turn switch 1 to ON and leave it like that for a few
minutes. After that you turn switch 1 back to OFF, and turn switch 2 to ON. Now enter the room.
If the light bulb is lit, then you know that switch 2 is connected to it. If the bulb is not lit, then it
has to be switch 1 or 3. Now touching the light bulb will give you the answer. If the bulb is still
hot, then switch 1 is connected to the bulb; if the bulb is cold, then it has to be switch 3.

Question 2
In the middle of a round pool lies a beautiful water-lily. The water-lily doubles in size every
day. After exactly 20 days the complete pool will be covered by the lily. After how many days will
half of the pool be covered by the water-lily?

Answer 2
19 days. Since the water-lily doubles its size every day and the complete pool is covered after
20 days, half of the pool will be covered one day before that, so 19 days.

Question 3
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?

Answer 3
16 days. Since the snail moves up 1 meter a day so it will reach 15 meters in 15 days. next
day it will again climb 5 meters upward and reaches the top.

Question 4
If 5+3+2 = 151012, 9+2+4 = 183662, 8+6+3 = 482466, 5+4+5 = 202504 then what will be
the answer of 7+2+5? Only 2% people are able to solve this aptitude question. Let's see if you
can do it.

Answer 4
7 + 2 + 5 = 143542. Explanation: a + b + c leads to a 6-digit number.
- The first and second digits are the product of a and b.
- The third and fourth digits are the product of a and c.
- The fifth and sixth digits are b*(a+c) with the digits of the solution
reversed.

Question 5
You have to measure exactly 4 liters of water, but you only have a 3-liter bottle and a 5-liter
bottle. How do you do it?

Answer 5
Fill the 3-litre bottle and pour it into the empty 5-litre bottle. Fill the 3-litre bottle again, and
pour enough to fill 5-litre bottle. This leaves exactly 1 litre in the 3-litre bottle. Empty the 5-litre
bottle; pour the remaining 1 litre from the 3-litre bottle into the 5-litre bottle. Fill the 3-litre bottle and pour it into the 5-litre bottle. The 5-litre bottle now has exactly 4 litres.