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Calculate the number 489

NUMBERMANIA: Calculate the number 489 using numbers [9, 9, 4, 5, 97, 992] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 4

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Fill Oreos with white toothpaste

Grand April Fools' Day pranks, as impressive as they are, require careful planning. And though massive, meticulously planned pranks certainly gets a rise out of unlucky prankees, it's the subtle pranks that pack the most surprise.

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End of OSCAR 1

In 1962, OSCAR 1, the first Orbiting Satellite Carrying Amateur Radio burnt up in the Earth's atmosphere. Its orbit had decayed since its last transmission on 1 Jan 1962, having spent 312 orbits in 22 days signalling HI in Morse code for radio amateurs around the world to receive from space until its non-rechargeable battery failed. It was achieved by San Francisco Bay radio hams, most having experience working at electronics companies, who arranged for their 10-lb hand-built transmitter to be placed in orbit just above the Earth's atmosphere, carried piggyback on a rocket launched to deploy a military satellite on 12 Dec 1961. That day marked the 60th anniversary of Marconi's first transatlantic radio transmission. It was also little more than four years since Russia launched the Sputnik satellite on 31 Jan 1957.«[Image: OSCAR 1 satellite held by Frank Ginner, one of its builders.]

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