Calendar
Trick
.
Ask
what, day, month
and
year
the person was born.
Then
tell
them which day
of the week this person was
born.
How to predict the day :
Example
:
Let us assume the person reveals that his date of birth was February
12, 1978.
Two
formulas are used for prediction :
January, October = 0
May = 1
August = 2
February, March, November = 3
June = 4
September, December = 5
April, July = 6
Sunday = 0
Monday = 1
Tuesday = 2
Wednesday = 3
Thursday = 4
Friday = 5
Saturday = 6
1 - Drop the "19" in the year of birth (1978 becomes 78)
2- Divide this number by 4 and drop
the
remainder (78 / 4 = 19
remains 2)
3- Add this answer to year of birth ( 19
+ 78
= 97)
4- Add the day of the month of birth to this total (97
+ 12
= 109)
5- From the first formula, add the value of the month (February = 3,
109
+ 3 = 112)
6- Divide this total by 7 (112 / 7 = 16 remains 0)
7- Take this remainder (0)
and apply this number to the days
in formula 2)
0
= Sunday
Therefore, he was
born on a Sunday.
Go amaze someone!
PS:
Try these Math
Activities
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