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Based on the fact that Sam's mental age is identical to his chronological age, his IQ score is 100.

What is Sam's IQ score?

IQ scores are calculated as:

= Mental age / Chronological age x 100

Assuming the mental and chronological age is x, the formula becomes:

= x / x × 100

= 1 x 100

= 100

Find out more on IQ scores at https://brainly.com/question/6352562.