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0 / 60 seg.
Double it and multiply it by 4. Then divide it by 8 and you'll have it once more. What number is it?
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Clue
WHEN A WINDOW IS BROKEN FROM THE OUTSIDE BY A THIEF, MOST OF THE GLASS WILL BE FOUND ON THE INSIDE OF THE HOUSE, NOT ON THE OUTSIDE OF THE HOUSE
20 TIMES. (8, 18, 28, 38, 48, 58, 68, 78, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 98)
27 STUDENTS. THE NUMBER OF BOYS MUST BE A MULTIPLES OF 3 (3, 6, 9, 12, ...) SO THAT IT CAN BE SPLIT IN THE RATIO OF 2:1 (NO WATCH:WATCH). THE NUMBER OF GIRLS IS DOUBLE THE NUMBER OF BOYS - 6, 12, 18, 24, ETC. SO THE TOTAL NUMBER OF STUDENTS CAN ONLY BE 9, 18, 27, 36, ETC
ANY NUMBER. IF A NUMBER IS DOUBLED AND MULTIPLIED BY 4, IT'S ACTUALLY BEEN MULTIPLIED BY 8, SO DIVIDING BY 8 WILL GET YOU THE ORIGINAL NUMBER AGAIN
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