I want to ask~~~~~

👨🏻‍🏫 學術台數學

chiang_markus5

2006-12-16 12:52 am

I've heard someone said these numbers can add quickly,

2,4,6,10,16,26,42,68,110,178

How can I do it?

回答 (2)

super

2006-12-17 8:08 pm

✔ 最佳答案

You can make it easier,like this.

42*11=462

規律是把the 7th number 乘11

That is the answer.

:)

參考: ME

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kenny

2006-12-16 10:09 pm

2+4=6
4+6=10
6+10=16
10+16=26
......
68+110=178
110+178=288
........................................

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