### Brain Teasers

# Triples 5

Series
Series teasers are where you try to complete the sequence of a series of letters, numbers or objects.Series

A Triple is a Series with 6 sets, each with 3 numbers apiece. The relationship between the first two numbers are the same throughout all of the sets, and the relationship between the last two numbers is also the same, however, it is different than the first relationship.Try and find the missing numbers:

2 8 16

3 18 54

4 32 128

5 __ ___

_ 72 ___

_ __ 686

2 8 16

3 18 54

4 32 128

5 __ ___

_ 72 ___

_ __ 686

### Answer

2 8 163 18 54

4 32 128

5 50 250

6 72 432

7 98 686

Relationship for first two numbers: square it, double the square (2 squared=4, 4 doubled=8)

Relationship for last two numbers: multiply by first number (8 multiplied by 2= 16)

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