A bag has 6 sticks with lengths of 1,3,5,7,9,11,13cm. How many different triangles can be made of these sticks

Question

(a)20 (b)11 (c)8 (d) 1 (e)5

Answer 1

3

Answer 2

B
3 5 7
3 7 9
3 9 11
3 11 13
5 7 9
5 7 11
5 9 13
7 9 11
7 9 13
7 11 13
9 11 13
actually there's more if you use 1+3= one side of the triangle ,but i wont go there, you could also break a stick in two.

Answer 3

The sides of triangles are :

3 5 7
3 7 9
3 9 11
3 11 13
5 7 9
5 7 11
5 9 11
5 9 13
9 11 13

so 9 triangles can be formed

Answer 4

20

Answer 5

1, 3, 5, 7, 9, 11, and 13 cm? That is 7 sticks. Don't know the answer.

Answer 6

can u use all of the sticks 2 form a huge triangle?? how abt using any 4 or 5? if u can,

6! = 720

Answer 7

You need to re-read your question.
You said "A bag has 6 sticks with lengths of 1,3,5,7,9,11,13cm"

Your bag of 6 sticks has 7 sticks in it.

Basically, you pick the long stick and pick two other sticks where sum of both are longer than the first.

Answer 8

Sticks considering lengths of 1,3,5,7,9,11
conbination possible are
3,5,7
5,7,9
7,9,11
3,7,9
3,9,11
5,7,11
5,9,11
i.e Possible are 7

using sticks 1,3,5,7,9,11,13
possible combination are

357
379
3911
31113
579
5711
5911
5913
51113
7911
7913
71113
91113

Solution are 13 triangles

More answers are possible when 2 or more sticks are joined to form one side of triangle

Answer 9

you must take out those pairs (a,b,c)
such that a+b for example
1,3,5 is not good since 1+3<5
3,5,11 not good because 3+5<11
you can make a triangle iff the sum of 2 sides is bigger then the third one

haha greyhound
ok i will call it 3-tuple

Answer 10

i dont really know how to start with that question. you said 6 sticks but you gave 7 lengths.

because i have no idea what i'm doing, i'm just gonna take 6 + 7 and minus the 2 points i'll be getting and voila, i'll get 11.

so its (b)