Brain Training "Just Numbers"

[Martin3203]

9

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[brschoppe]

I say both 6 and 9 are correct

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[Perla]

Very good point.

8= 56

147= 42

126= 30

105= 20

83= 12

What does not work with this approach is that there is an asynchrony step on the left side (5 to 3) while the right side is fully synchron.

IMHO

Yes that's what math is for - to confuse the cat.

What puzzled me was the jump from 5 to 3. As there is a irregularity in there, I was looking for pattern/ logic solution. That's what math crack head look for - for unobvious pattern.

Pick the truth. LOL

[vinnyvega]

It is 6. 6 is the correct number.

[shlomo]

Very good point.

8= 56

147= 42

126= 30

105= 20

83= 12

What does not work with this approach is that there is an asynchrony step on the left side (5 to 3) while the right side is fully synchron.

IMHO

You're right. Even using the new pattern, the answer will still be 6. Neat.

[bigharpoon]

6 is my guess

[Trevor2118]

Optic101, on 20 Dec 2015 - 12:04 PM, said:

What does not work with this approach is that there is an asynchrony step on the left side (5 to 3) while the right side is fully synchron.

IMHO

That certainly clears things up.

[aushy]

Are you sure?

It also could be:

8= 56 -14

7= 42 -12

6= 30 -10

5= 20 -8

3= 12

You skipped number 4. I think you mean:

4 = 12 -6

3 = 6

That's the way I saw the pattern, the subtraction on the right hand side is decreasing in 2 each time. E.g. subtract 14, subtract 12, subtract 10 etc. I never thought of it like x*x -x like some of you guys did. Interesting the way people work this out differently.

The use of the equals sign really annoys me though. 8=56 is a blatant lie!! So on second thoughts, I'm going to change my answer to 3=3. I challenge you to prove me wrong!