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| How young is he? (Posted on 2011-05-16) |
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My math teacher was born in a year whose digits add up to 26.
He says that in his birth month the number of days before his birth day is thrice the number of days after it.
How old is he now?
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Submitted by Ady TZIDON
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Rating: 3.0000 (2 votes)
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Solution:
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(Hide)
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AGE:23. Born 2/22/1988.
Since the number of days before his birth day is thrice the number of days after it the month must contain 4*k+1 days.
The only month fitting this demand is February of a leap year.
Sum of digits and divisibility by 4 define 1988 as the
right year, the date is Feb 22,
The period of 21 days prior to his birth equals 3*7 days following the 22nd.
The guy is over 23 yrs old.
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