National Cyber Security Policy and 6th Tamil QA mp3

Cyber crimes are fast developing as potential threats not only to normal internet users, but even to a country’s security and economy. With the advancement in technology, the ways to conduct cyber crimes are also becoming more advanced and lethal. It has been reported that as many as 308,371 Indian websites were hacked between 2011 and 2013, and worryingly, 78 of those were government websites. Hacking critical government websites can leak highly (more…)

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Time & Work Calculation and TNPSC Group II Main Model Question

Time & Work Calculation and TNPSC Group II Main Model Question

A can complete a journey in 20 hours. He travels first half of the journey at the rate of 42 km/hr and second half at the rate
of 48 km/hr. Find the total journey in km.

An aeroplane flies along the four sides of a square at the speeds of 400, 600, 800 and 1000 km/h. Find the average speed
of the plane around the field. (more…)

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