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Replace the question mark with a number

MATH PUZZLE: Can you replace the question mark with a number?

Correct answers: 566

The first user who solved this task is Sanja Šabović.

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Denis Leary: Laptops May Lead to Impotence

Laptops may lead to impotence. Yay. Im buying my daughters boyfriend an Apple MacBook first thing tomorrow morning.

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Mars probe

In 1997, the Mars Pathfinder, an unmanned space vehicle, reached the Martain atmosphere. It had taken seven months to travel there since its launch on 4 Dec 1996. Its main science mission was to study the Martian atmosphere and investigate the geology and chemical composition of the planet's rocks and soils. The descent was braked by a heat shield, a parachute and rockets. Using a new NASA effort for "cheaper, faster, better," the Mars Pathfinder used airbags to cushion its landing on the surface. It carried Sojourner, a 10-kg (22-lb) wheeled rover device designed to travel slowly across the surface of Mars taking photographs and collect other scientific data, while also testing autonomous-vehicle technology on the Martain terrain.

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