If you were asked what day of the week it would be in 78
days, would you be able to tell? Or if you were asked what month it would be in
19 months, would you be able to tell immediately? Or if you were asked what
date it would be in 38 days, would you be able to tell immediately? Of course,
all of these are possible with a trick in mathematics.
Calendar arithmetic is based on the days of the week, with 7
digits, 0, 1, 2, 3, 4, 5, and 6, representing Sunday, Monday, Tuesday,
Wednesday, Thursday, Friday, and Saturday, respectively.
A work was assigned to someone on Tuesday. He completed the
work after 72 days. On which week was the work completed?
The number for Tuesday is 2
2+72 =74
7)74(10
70
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4
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The number four is indicating Thursday.
The answer is Thursday.
There are 12 months in a year. This is taken as a monthly numerology tool. The numbers 0,1,2,...11 represent the month, with 0 representing December, 1 representing January, and 11 representing November. For example, if the answer is 5, the month is May.
Here we need to know that the modulus of the numbers from
zero to 11 is 12. Considering that, we can answer questions about months.
What month comes 19 months after July?
The number for July is 7
7+19 = 26
12)26(2
24
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2
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Number 2 is indicating February month.
The answer is February.