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# Calculate the number 989

NUMBERMANIA: Calculate the number 989 using numbers [5, 2, 5, 7, 40, 882] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
The first user who solved this task is Nílton Corrêa de Sousa.
#brainteasers #math #numbermania

### One day in class, the teacher...

One day in class, the teacher brought a bag full of fruit and said, "Now class, I'm going to reach into the bag and describe a piece of fruit and you tell me which fruit I'm talking about. Alright, the first one is round, plump, and red. Little Johnny raised his hand high but the teacher ignored him and picked Deborah who promptly answered, "Apple." The teacher replied, "No Deborah, it's a beet, but I like your thinking. Now the second one is soft, fuzzy and colored red and brown." Johnny is hopping up and down in his seat trying to get the teacher to call on him but she calls on Billy. "Is it a peach?" Billy asks. "No, it's a potato, but I like your thinking," the teacher replies. "Okay the next one is long, yellow, and fairly hard." Johnny is about to explode as he waves his hand frantically but the teacher calls on Sally who say, "A banana." The teacher responds, "No, it's a squash, but I like your thinking." Johnny is irritated now so he speaks up loudly, "Hey, I've got one for you teacher. Let me put my hand in my pocket. Okay, I've got it. It's round, hard, and it's got a head on it." "Johnny!" she cries, "That's disgusting!" "Nope," answers Johnny, "It's a quarter, but I like your thinking!"
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### Caspar Friedrich Wolff

Born 18 Jan 1734; died 22 Feb 1794 at age 60. German physiologist, known as the "founder of modern embryology." In Theoria Generationis (1759) he first wrote an epigenetic theory of development: that the organs of living things take shape gradually from non-specific tissue. Wolff applied the microscope to the study of animal embryology and remarked that "the particles which constitute all animal organs in their earliest inception are little globules, which may be distinguished under a microscope." The book was ignored for half a century, as the prevailing idea was held that life begins preformed in a small body that grows larger in the same form. His name is found describing parts of the kidneys of embryos: the Wolffian body and the Wolffian ducts.
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