Brain Teaser: What Number Goes in the Last Triangle?

2 thoughts on “Brain Teaser: What Number Goes in the Last Triangle?”

1. 

   Abdulhameed . N . Muhammad

   January 15, 2016 at 11:20 am

   hmm 4 i guess

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   1. 

      Akinlabi Omo-Oso

      January 16, 2016 at 11:08 pm

      3, actually. See the sequence: 6*2 – 2*2 = 12 – 4 = 8; 7*2 – 2*4 = 14 – 8 = 6. Hence, 6*3 – 3*5 = 18 -15 = 3!

      Reply