Messages posted by Avinash Jadhao

Melting point and boiling point are dependent on mass they are directly proportional to mass.....

Simplify

Cos(7.5⁰)

Without using a calculator

You may use any of the formula.

Plz mention the formula too.

IIT aspirants will now get to see their evaluated JEE answer scripts even before the result is declared on May 18. IIT Delhi, which organised JEE on April 8 this year, has decided to upload the checked optical response sheets of every candidate on the JEE website to maintain transparency and avoid any errors. It is for the first time that the candidates will get a chance to go through their answer sheets to see if they have been evaluated properly.

If a candidate finds any discrepancy, he or she can lodge a complaint online. These evaluated answer sheets will be available online from May 5 to May 10. The facility to submit requests for revision will close at 5pm on May 10 after which representatives of all IITs will meet to consider the requests. If found correct, the responses will be updated by May 14. According to IITD director, R Shevgaonkar, it may happen that the scanner does not pick up correct responses if a candidate has not filled the response bubble completely.

"In such a case, they can simply lodge a complaint and we will go through it before the preparation of the final merit list," he said. However, candidates will not be allowed to change their responses or question the answer keys provided by IITD. The facility is only for highlighting any technical glitches.

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thanx..

Around 4,80,000 IIT aspirants, who had appeared for the IIT JEE 2012, will be able to view their answer sheets online on the websitesof the respective IITs. The scanned versions of the Optical Response Sheets (ORS) will be displayed on the websites from May 5 to May 10 for candidates to view their answers vis-a-vis the correct responses, including their individual scores.

According to GB Reddy, chairman, JEE 2012, the answer key uploaded on the websites will enable students to view the correct answers to all questions versus their answers to each question. They can also register complaints online.

"In this process, students can only register a complaint on a technical error , for example, a circle marked partially or improperly shaded, for which the ORS machine was unable to read the answer and hence did not allot marks. However, students will not be able to change their answers," he says.

RK Shevgaonkar, director, IIT-Delhi says, "Allowing students to view their answers is to ensure transparency in the JEE results, so that every candidate is satisfied with the evaluation."

A committee of IIT officials at IITDelhi will assess complaints manually till May 14 and the final results will be displayed on May 18.

Around 10,000 candidates will be admitted in the 16 IITs across the country this year.

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‎"Every Sachin Tendulkar's FAN must READ.. N "Share" this.!!

India vs

Australia[2004] match..

Brad Hogg

took Sachin Tendulkar's wicket.

At the end of the match Hogg gave that

Ball to Sachin for his autograph.

Sachin put his sign with one beautiful sentence,

"IT WILL NEVER HAPPEN AGAIN"

Till today Hogg could not take his wicket for the second time

After this incident Hogg and Sachin Tendulkar came

face to face 21 times..

but he could never get d Masterblaster out

"THIS IS CONFIDENCE"

"THIS IS Sachin Ramesh Tendulkar" \m/

Mentally Multiply by 5, 25, 50, 250

This is a simple quicker math trick but it can be very useful for young students to solve seemingly difficult calculations. I will be glad to get your feedback on this.

Mental multiplication by 5, 25, 50, 250, 500 and so on. Any number can be expressed in different ways. For example, 5 can be expressed as 10x(1/2).

Trick: Multiplication by 5

Step 1: Multiply the number by 10, i.e. simply place a zero after the number.

Step 2: Halve the resultant number.

Example 1:

5 × 136 = ten times of 136 i.e. 1360 should be divided by 2 = 1360/2 = 680

Example 2:

5 × 343, half of 3430 is 1715

Also check out, how to mentally multiply by 111?

Trick: Multiplication by 50, 500, 5000 and so on..

The above logic can also be applied to 50 which is half of 100 i.e. 1/2x100

Instead of multiplying the number by 10 we have to multiply by 100. So we have to place two zeroes after the number.

Example 1:

50 × 136 = hundred times of 136 i.e. 13600 should be divided by 2 = 13600/2 = 6800

Example 2:

50 × 647 = hundred times of 647 i.e. 64700 should be divided by 2 = 64700/2 = 32350

Same logic can be extended to numbers like 500, 5000 and so on.

Trick: Multiplication by 25

For multiplication by 25, we have to go one step further, 25=100 x (1/2) x (1/2)

Step 1: Multiply the number by 100, i.e. simply place two zeroes after the number.

Step 2: Halve the resultant number.

Step 3: Again halve the resultant number.

Example 1:

25 × 136 = hundred times of 136 i.e. 13600 should be divided by 2 = 13600/2 = 6800. Again halve this number, 6800/2 = 3400

Example 2:

25 × 343, half of 34300 is 17150. Again half of 17150 is 8575.

The above logic can also be extended to numbers like 250, 2500 and so on.

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Shortcut to Squaring Any 2-Digit Number

What do you do when your calculator has been confiscated and the world is depending on you to square a two-digit number within a minute? Don’t panic – just follow three simple steps that require basic addition and multiplication, and you’ll be able to solve the problem in no time. If you practice enough, you’ll even be able to complete each step mentally, rendering scratch paper unnecessary. This will save you time on drills and strengthen your skills so you can tackle other challenges. Eventually, you’ll be able to solve multi-step squaring problems without ever breaking a sweat – or a pencil.

This is a trick I learned during my old MATHCOUNTS days, but it comes in handy for lots of other competitive math as well. It was great for sprint, team, target, and countdown problems, but now it just comes as second nature whenever I run into a more complex problem that involves a squaring step. If you’re having trouble squaring two-digit numbers on the fly without a calculator, give this method a try. It seems a bit cumbersome at first, but as you practice, you’ll be able to speed up the process and get your answer within seconds.

3 Steps for 2-Digit Squares

Let’s work through the steps with an example to better demonstrate the process. Imagine that you’re expected to square 83 quickly and accurately – the following steps will help you complete the task.

1. Square each digit individually, making sure that you get a two-digit number for each square. If the number is low and its square gives you only one digit, use 0 as a placeholder.

8² = 64 and 3² = 9 = 09, giving you 6409

2. Now, multiply the two digits and double your answer, adding a 0 to the end.

8 X 3 = 24; 24 X 2 = 48, giving you 480

3. Simply add your answers from steps one and two.

6409 + 480 = 6889, or 83²

radius will decrease

means the dist. from the core to the outer surface will decrease and Acceleration due to gravity ( in earth ) iis inversely proportional to the distance of square between the object and the Centre of Earth.

Hope it helps...

A car is travelling with a speed equal to that on light on earth. A man with the same speed is running infront of the car ( just 2 metres ahead). If the Car driver puts the Car's headlight on and the man ahead looks backwards.. will the man be able to see the light coming from the headlights??

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