# The number in the brackets follow the same rule. what is the missing number? [3,4,17] [1,2,7][11,?,37][4,7,26] A. 4 B. 2 C. 3 D.1?

### 1 Answer

Relevance

- PuzzlingLv 71 month ago
Think of each triple as:

[x, y, z]

The pattern seems to be:

3x + 2y = z

In other words, triple the first number and add double the second number to get the third number.

3*3 + 2*4 = 17

3*1 + 2*2 = 7

3*4 + 2*7 = 26

For the partial triple:

3*11 + 2*y = 37

33 + 2y = 37

2y = 4

y = 2

Answer:

B. 2

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