Math Teachers at Play 63
Hmm… let’s see… now where did I put my notes? I know that this is supposed to be the Math Teachers at Play blog carnival… but which one?
Maybe the following puzzle will help. In the grid below, do the following:
- Circle any number, then cross out the other numbers in the same row and column.
- Of the remaining nine numbers, circle one, then cross out the other numbers in the same row and column.
- There should now be four numbers remaining; circle one. Then cross out the other numbers in the same row and column.
- There should now be one number remaining. Circle it.
- Calculate the sum of the four circled numbers.
Ah, yes! That’s it! This is Math Teachers at Play 63! Good day! Welcome one and all!
You might wonder why I’d start this carnival with so many questions. Maybe it’s because 63 is the ASCII code for a question mark.
Other interesting facts about 63:
- 63 = 7 × 9.
- 63 = 26 – 1 = 1 + 2 + 4 + 8 + 16 + 32.
- The record for the longest field goal in NFL history is 63 yards–kicked by Tom Dempsey, Jason Elam, and Sebastian Janikowski.
- 63 = 62 + 33.
- ‘Rule 63′ is an online adage, which states that every fictional character has a counterpart of the opposite gender.
- In Roman numerals, 63 is written as LXIII; and if you add the position of those letters in the alphabet, you get 12 + 24 + 9 + 9 + 9 = 63. It is the smallest number with this property. (Can you find the only other number with this property?)
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