This category is very vague. There are many things in Number Sense that are random math tricks that really do not belong to a category. For this reason I have created Miscellaneous. I would like to be able to separate these into more exact categories, but it seems impossible.
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(*) Definitions (*PDF*) |
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(*) Square roots (*PDF*) |
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(**) Cube roots (*PDF*) |
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(*) Subtracting reverses (*PDF*) |
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(**) Multiplying consecutive integers by 9 (*PDF*) |
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(**) Multiplying consecutive integers by 8 (*PDF*) |
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(**) Multiplying decreasing consecutive integers by 9 (*PDF*) |
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(**) Positive integral divisors (*PDF*) |
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(**) Sum of positive integral divisors (*PDF*) |
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(**) Relatively prime (*PDF*) |
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(**) Triangular numbers (*PDF*) |
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(***) Pentagonal numbers (*PDF*) |
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(***) Hexagonal numbers (*PDF*) |
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(***) Heptagonal numbers (*PDF*) |
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(***) Octagonal numbers (*PDF*) |
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(***) Manipulating polygonal numbers (*PDF*) |
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(**) Finding remainders (*PDF*) |
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(**) Dividing by 40 (*PDF*) |
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(**) Dividing by 25 (*PDF*) |
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(**) Dividing by 9 into a mixed number (*PDF*) |
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(***) Dividing [n! - (n-2)!] by (n-1)! (*PDF*) |
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(***) Dividing [n! + (n-2)!] by (n-1)! (*PDF*) |
| (***) Solving x2 - y2 = a3, when x,y are triangular numbers (*PDF*) |