BRAIN TEASERS !! (28/01/09)

Welcome to my blog... NOW I PRESENT TO YOU A FEW TEASERS... THANK YOU TO ALL MY READERS FOR YOUR CONTINOUS LOVE, SUPPORT AND AFFECTION

(P.S - DON'T TRY TO SNEAK INTO ANSWERS AT THE END OF THIS POST...)
1. What can't EAT FOR BREAKFAST ????

2. If you drop a steel ball weighing five pounds from a height of 45 inches, will it fall more rapidly through water at 20 degrees Fahrenheit or water at 40 degrees Fahrenheit. Or will it make no difference?

3. What tree is most warmly clad ?

4. A rubber ball is tossed off the top of a 100 foot building. Every time it bounces, it goes back up half way. How many bounces will the ball take before it stops ?

5. In 1990, a person is 15 years old. In 1995 that same person is 10 years old. How is this possible?


ANSWERS :
1. LUNCH OR DINNER
2. 40 degrees Fahrenheit. At 20 degrees Fahrenheit the water would be ice
3. A Fir tree
4. IT needs a bit of calculation :
100 feet = 1200 inches = 1200 * 2.5 cm = 3000 cms
Now as the ball drops down from 3000 cms and loses 50% altitude in every bounce
We divide 3000 cms by 2 until it becomes negligible...
3000/2 = 1500
1500/2 = 750
750/2 = 375
375/2 = 187.5
187.5/2 = 93.75
93.75/2 = 46.875
46.875/2 = 23.4375
23.3475/2= 11.7178
11.7178/2= 5.8593
5.8593/2 = 2.9296
2.9296/2 = 1.4648
1.4648/2 = 0.7324 cm = NEGLIGIBLE

THEREFORE COUNTING BACKWARDS WE GET 12 bounces before the ball comes to rest.

5. The years are in B.C.