Thursday, August 30, 2007
Thursday, January 25, 2007
playing with maths
lets play with maths for those who think calculations are pretty harder
some tricks involved in solving the square of a number& cube of number
eg:-
1)26^2=25^2+26th odd no=625+(2*26-1)=625+51=676
2)sly for, 36^2=35^2+(2*36-1)=1225+71=1296(and the trend continues for no. of the form x6^2)
3)21^2=20^2+21st odd no.=400+41=441
4)29^2=30^2-30thodd no.=900-(2*30-1)=900-59=841
5)34^2=35^2-35th odd no.=1225-69=1156
6)for 23^2=25^2-4*24=625-96=529
7)32^2=30^2+4*31=900+124=1024
cubes:-
1)ex:-103^3=the formula says (100+3x/3x^2/x^3)=100+9/27/27=1092727
sly
2) 16^3=the base is 10 here not 100 so evaluating for this we get=10+3*6/3*6^2/6^3=28/108/216=add 21 the second left u get 28/108+21/6=28/129/6=now add 12 to the left most u get 4096 steps seems to bebig when doing it becomes easier...........
some tricks involved in solving the square of a number& cube of number
eg:-
1)26^2=25^2+26th odd no=625+(2*26-1)=625+51=676
2)sly for, 36^2=35^2+(2*36-1)=1225+71=1296(and the trend continues for no. of the form x6^2)
3)21^2=20^2+21st odd no.=400+41=441
4)29^2=30^2-30thodd no.=900-(2*30-1)=900-59=841
5)34^2=35^2-35th odd no.=1225-69=1156
6)for 23^2=25^2-4*24=625-96=529
7)32^2=30^2+4*31=900+124=1024
cubes:-
1)ex:-103^3=the formula says (100+3x/3x^2/x^3)=100+9/27/27=1092727
sly
2) 16^3=the base is 10 here not 100 so evaluating for this we get=10+3*6/3*6^2/6^3=28/108/216=add 21 the second left u get 28/108+21/6=28/129/6=now add 12 to the left most u get 4096 steps seems to bebig when doing it becomes easier...........
quotes for the day
It is easy to dodge a spear that comes in front of you but hard to keep harms away from an arrow shot from behind.
An inch of time is an inch of gold but you can't buy that inch of time with an inch of gold.
An inch of time is an inch of gold but you can't buy that inch of time with an inch of gold.
Wednesday, January 24, 2007
How to fail your Driving Test
1. Turn the radio on. When the tester goes to turn it off slap his/her hand.
2. Rev the car really high, turn to the tester, and say with an evil look, "Buckle up!"
3. Knock over every cone while doing manoeuvrability. In the middle of it, get out and check to see if you have hit every one.
4. Come dressed in a suit. Before the examiner gets in the car, ask him/her to put a piece of plastic wrap down so he doesn't dirty the seat.
5. When the examiner tells you to stop, step on the gas. Tell him/her that you thought it was the brake.
6. When the examiner tells you to stop, pop the hood clutch and say "Oops."
7. Get in the car, look down at the pedals, and say, "Now which one is the gas again?"
8. After the examiner gets in the car, pop the hood, and get out and check the oil.
9. Fill your car with beer bottles.
10. The whole time driving, talk about how Aunt Gertrude smells like mothballs.
11. Tell the registrar that you are taking the remedial test.
12. In the middle of driving, put your arm around the examiner.
13. Swear at everybody on the road.
14. When you stop at a light, start revving the engine while looking back and forth between the person next to you and the light.
15. Beep your horn at everything.
16. Break off your rear-view mirror and then ask the examiner to hold it up.
2. Rev the car really high, turn to the tester, and say with an evil look, "Buckle up!"
3. Knock over every cone while doing manoeuvrability. In the middle of it, get out and check to see if you have hit every one.
4. Come dressed in a suit. Before the examiner gets in the car, ask him/her to put a piece of plastic wrap down so he doesn't dirty the seat.
5. When the examiner tells you to stop, step on the gas. Tell him/her that you thought it was the brake.
6. When the examiner tells you to stop, pop the hood clutch and say "Oops."
7. Get in the car, look down at the pedals, and say, "Now which one is the gas again?"
8. After the examiner gets in the car, pop the hood, and get out and check the oil.
9. Fill your car with beer bottles.
10. The whole time driving, talk about how Aunt Gertrude smells like mothballs.
11. Tell the registrar that you are taking the remedial test.
12. In the middle of driving, put your arm around the examiner.
13. Swear at everybody on the road.
14. When you stop at a light, start revving the engine while looking back and forth between the person next to you and the light.
15. Beep your horn at everything.
16. Break off your rear-view mirror and then ask the examiner to hold it up.
Psychology of penalty kicks
An academic paper looks at the statistics of penalty shoot-outs, and concludes that the psychological pressure plays a pretty prominent role. Before you go "D'oh!", read this summary which discusses some of the implications of this finding:
For the first kick, when the pressure is relatively low, an average of 87% of kicks were successful. But the rates of success then start to drop, down to 73% for a fourth shot, when the pressure is often higher. The success rates could be partly influenced by coaches picking their best players to shoot at certain times. But that can't account for all the difference, Jordet says.
The results are even more dramatic for the highest-pressure situations. When missing a kick means defeat for the entire team, the success rate plummets to 52%. But when a successful kick guarantees a win, 93% of attempts go in
For the first kick, when the pressure is relatively low, an average of 87% of kicks were successful. But the rates of success then start to drop, down to 73% for a fourth shot, when the pressure is often higher. The success rates could be partly influenced by coaches picking their best players to shoot at certain times. But that can't account for all the difference, Jordet says.
The results are even more dramatic for the highest-pressure situations. When missing a kick means defeat for the entire team, the success rate plummets to 52%. But when a successful kick guarantees a win, 93% of attempts go in
quotes of the day
Nothing changes your opinion of a friend so surely as success - yours or his
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The outcome of any serious research can only be to make two questions grow where only one grew before.
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The outcome of any serious research can only be to make two questions grow where only one grew before.
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