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MATH PUZZLE: Replace the que...

MATH PUZZLE: Replace the question marks with a numbers and calculate product these numbers.

Correct answers: 155

The first user who solved this task is Roxana zavari.

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April Fool's Day - Suggestion

Stick googly eyes on the food in your refrigerator.

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First Large Solid Fuel Rocket

In 1965, the first large solid-fuel rocket - a Titan 3C - rocket was launched into orbit. Compared to a liquid-propellant rocket, a solid-propellant rocket has fewer parts, simpler construction, is safer and more reliable, and yet it can develop greater power (thrust) than a liquid-propellant rocket of the same size. Many military and NASA payloads have been put into orbit with the generations of this launch vehicle family.

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