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Why newspaper has 4 colour dots ?

These 4 dots are called colour bars. Each colour in printing is a combination of Cyan (C), Magenta (M), Yellow (Y) and Black (K).
Some sources say that “K” in CMYK stands for key because in four-color printing, cyan, magenta, and yellow printing plates are carefully aligned with the black plate which is the key.

Newspapers are printed at extremely high speeds, So this is impossible to cheak all these newspapers physically.
These dots are ‘printer marks’. Dots ensure the image quality/printing quality.

Extra Gyaan

More desired colours can be obtained by adding the right proportion of these four colors. To print an image, all these color plates are placed separately on a page and are in the same line while printing. If photographs are blurred in newspapers, it means that the plates of these four colors have overlapped.



For printing the newspaper, the printer needs to lay the color plate of these four colors in perfect alignment so that the image quality is crisp. If not, the images will…

Why maximum Indian Trains are of "Blue Colour"?

Indian Railways had Reddish colour on all trains till 1996 . The brakes Of that Reddish Colour Train had to change to New modern Brakes .
Later when the brakes were changed to vacuum brakes they changed the colour for identification.
They found it easy to identify which train has new brakes. Gradually, all Trains colour change to Blue colour. 
Extra Gyaan
Only Rajadhani, Shatabdi, Jan-shatabdi, Garib Rath, Duronto and Yuva expresses have a different colour. That doesn't mean that this trains have old brakes. They are special trains so they have special colour. The day expresses of Central Railway have a white strip over the blue colour.


Congratulation,
Now, You know this amazing fact. Go & ask your friends about this.
see u soon... :-)

Who Is 'Success Kid' ?

This kid is popularly Known as "success Kid" Real name of this kid is Sammy Griner.
Laney Greiner, the mother of this kid, is a photographer.  On day she was on a beach with her 11 month old son (Success Kid).  The son sanded his fist and had to eat. Mom took a photo on this occasion and put this picture to flickr. People liked the photo very much and started sharing this.
Extra Gyaan
Shortly before Sammy Griner's birth, his father Justin was diagnosed with kidney failure, for which he received dialysis for four hours per session, three days a week. 
In April 2015, Laney Griner launched a GoFundMe campaign, hoping to raise $75,000 to help pay for his medical care and an eventual Kidney Transplant.