National Mathematics Day

In India, the day 'December 22' has been declared as the National Mathematics Day. The Declaration was made by Dr Manmohan Singh, then Prime Minister of India. To celebrate birth anniversary of great Indian autodidact Mathematician Srinivasa Ramanujan. This year, it will be the 130th birth anniversary of Srinivasa Ramanujan. In 2011, Union Government had declared 22nd December as ‘National Mathematics Day’ to celebrate Ramanujan’s 125th birth anniversary. Government also had declared year 2012 as National Mathematics Year.

Agni 5

Surface-to-Surface nuclear capable ballistic missile 'Agni-5' has been successfully launched by India. The state-of-the-art surface-to-surface missile was test fired successfully from the launch complex 4 of the Integrated Test Range from the Abdul Kalam Wheeler Island off Odisha coast. It was the fourth developmental and second canisterised trial of the missile.

 About Agni-5 missile:

Agni 5 is three-stage solid propellant ICBM indigenously developed by the Defence Research and Development Organisation(DRDO).

Unlike other missiles of Agni series, Agni-5 is the most advanced having new technologies incorporated with it in terms of navigation and guidance, warhead and engine.

It is about 17 metre long, 2 metre wide and has launch weight of around 50 tonnes. It is capable of striking a target more than 5,000 kilometres with nuclear warhead carrying capacity of more than 1 tonne.

Thus, it can hit most northern parts of China and other parts of Asia, Europe and Africa. It has not yet inducted into the Services.

It carries Multiple Independently Targetable Re-entry Vehicles (MIRV) payloads. A single MIRV equipped missile that can deliver multiple warheads at different targets.

It is also incorporates advanced technologies involving ring laser gyroscope and accelerometer for navigation and guidance.