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Number Sense
L E T S G O B O Y S
9
Mathematics
12th Grade
04/16/2015
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Cards

Term
What is the eighth heptagonal number?
 Definition
148

(n(5n-3))/2
Term
What is the fifth hexagonal number?
 Definition

45

 

(n(4n-2))/2
Term
What is the fourth octagonal number?
 Definition
40

(n(6n-4))/2
Term
1+2+3+4+5…+31
 Definition
496

(m(m+1))/2
Term
1+3+5+7...+33
 Definition

289

 

((m+1)/2)2
Term
13+23+33...+83
 Definition

1296

 

((m(m+1))/2)2
Term
12+22+32...+92
 Definition

285

 

((m)(m+1)(2m+1))/6
Term
9+3+1+(1/3)...
 Definition

13.5

 

a1/(1-d)
Term
What is the politeness of the number 90?
 Definition

6

 

90 = (21)(32)(51)

(2+1)(1+1) = 6
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