Cool Number Dates – 6/22/14-6/28/14

Mostly there are even numbered days this week – four dates that are all multiples of 2: 6/22/14, 6/24/14, 6/26/14, and 6/28/14.

And, the half-back day for this month is today!  Go up 16 from 6 to 22, then come half way back (8) to 14: 6/22/14.

Don’t be bored with all these even number dates in June.  There are only 8 cool dates in all of July!

Cool Numbers – 5/25

Sorry, no cool dates this week, but do you know where the term “Square” of a number comes from?

Check out the following square of numbers:

7    7    7    7

5    5    5    7

3    3    5    7

1    3    5    7 

 

1    2    3    4

 

The squares of the numbers in the row set apart: 1×1 = 1;  2×2 = 4;  3×3 = 9;  4×4 = 16

 

Look at the bottom row in the square: 

1  = 1 = 1×1

1 + 3  = 4 = 2×2

1 + 3 + 5  = 9  = 3×3

1 + 3 + 5 + 7  = 16 = 4×4

 

What’s the number in the next row and column of the square?    (9)

What’s the next sum in the bottom row of the (larger) square?    (1+2+3+4+5 = 25 = 5×5)

What is today’s date?  5/25

 

Cool Number Dates – 5/11/14 – 5/17/14

I don’t have any cool dates on my calendar for this year, but I can punt.

Today is Mother’s Day! We can celebrate even without great numbers.

 

Five and Fourteen don’t get along very well.  Come back next year because 5 and 15 have a great relationship!

5/11/14 through 5/17/14:  11, 12, 13, 14, 15, 16, and 17… each is one number larger than the previous!

And 5/15 is the Ides of May.  Some Roman or Greek or somebody was probably assassinated that day, although it is not as popular as the Ides of March.