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Calculate the number 3920

NUMBERMANIA: Calculate the number 3920 using numbers [5, 4, 7, 3, 34, 425] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 31

The first user who solved this task is Allen Wager.

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If you’re American when you go into the bathroom, and you’re American when you leave the bathroom, what are you while you’re in the bathroom?
European.

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Huntington's gene

In 1993, the identification of the gene that causes Huntington's disease was announced as the result of ten years' effort by the Huntington's Disease Collaborative Research Group, formed by six laboratories in the U.S., England and Wales. They stressed that more work remained before the mutation could be used as a precise prognostic tool. The disease causes progressive debilitating symptoms of jerky movements, dementia, personality changes, memory loss and irritability. The mutation, found on chromosome 4, affects a triplet of genetic units called bases represented by the chemical initials CAG, of which from 11 to 34 triplets are normally present in healthy people, whereas Huntington's patients have from 35 to 100 of them.«

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