Pattern brain teaser

  • #1
239
0
if
1*2=2*1
2*3=2*1+2*2
3*4=2*1+2*2+2*3
4*5=2*1+2*2+2*3+2*4

then
3*1+3*2+3*3+3*4=???
 

Answers and Replies

  • #2
918
16
Answer is whited out:

2 * (1 + 2 + 3 + 4 + 5)
 
  • #3
239
0
umm. i'm sorry but i guess i suppose to rephrase the question,
???=3*1+3*2+3*3+3*4

in form of
1*2
2*3
and
3*4
 
  • #4
918
16
Answer whited out:

5 * 6
 
  • #5
239
0
???=3*1
???=3*1+3*2
???=3*1+3*2+3*3
???=3*1+3*2+3*3+3*4
???=3*1+3*2+3*3+3*4+3*5
 
  • #6
1,548
0
ArielGenesis said:
???=3*1
???=3*1+3*2
???=3*1+3*2+3*3
???=3*1+3*2+3*3+3*4
???=3*1+3*2+3*3+3*4+3*5
1*3
3*3
3*6
5*6
5*9
7*9
7*12
9*12
etc - Good one
 
  • #7
239
0
at, that's what i am looking for
 
Last edited:

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