MATH PUZZLE: Can you replace...
[3285] MATH PUZZLE: Can you replace... - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 208 - The first user who solved this task is On On Lunarbasil
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MATH PUZZLE: Can you replace...

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 208
The first user who solved this task is On On Lunarbasil.
#brainteasers #math #riddles
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Where did The Blood Come From?

Two vampire bats wake up in the middle of the night, thirsty for blood. One says, "Let's fly out of the cave and get some blood."
"We're new here," says the second one. "It's dark out, and we don't know where to look. We'd better wait until the other bats go with us."
The first bat replies, "Who needs them? I can find some blood somewhere." He flies out of the cave.
When he returns, he is covered with blood.
The second bat says excitedly, "Where did you get the blood?"
The first bat takes his buddy to the mouth of the cave. Pointing into the night, he asks, "See that black building over there?"
"Yes," the other bat answers.
"Well," says the first bat, "I didn't."

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Carl Gustaf Mosander

Born 10 Sep 1797; died 15 Oct 1858 at age 61.Swedish chemist and mineralologist; whose work revealed the existence of numerous rare-earth elements with closely similar chemical properties. In 1839 he discovered lanthanum (La) which is used as a component of misch metal (used for making lighter flints) and rare-earth compounds containing lanthanum are extensively used in carbon lighting applications, especially by the motion picture industry for studio lighting and projection. He discovered other rare earth metals: erbium (Er) in 1842 and terbium (Tb) in 1843. Erbium oxide is rose-pink, and it is used to make pink glass and pink potter's glaze. Terbium oxide has potential as an activator for green phosphors used in colour televisions tubes.[Image: Lanthanum ore.]
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