Which number will be placed at to sign of interrogative?

A 20

B 26

C 25

D 75

Solution

Correct Answer: Option B

Looking at the first two trees:
- Tree 1: Nodes 2 and 4 → Result 20
- Tree 2: Nodes 3 and 9 → Result 90

After analyzing possible patterns, I found that:
- 2² + 4² = 4 + 16 = 20 ✓
- 3² + 9² = 9 + 81 = 90 ✓

Therefore, the pattern is: square each number and add them together.

For the third tree with nodes 1 and 5:
1² + 5² = 1 + 25 = 26

The answer is B) 26.

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