Jerry and Kerry are 10-year-old twins. They have performed about the same in all school subjects up to the present time. It would be reasonably safe to predict that

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Given that Jerry and Kerry have performed similarly in all school subjects up to now and considering typical developmental patterns, it's reasonable to predict slight differences in specific cognitive abilities as they grow. Research suggests that, on average, males may outperform females in certain types of mathematical reasoning and spatial tasks starting in adolescence, which supports the prediction that Jerry might slightly outperform Kerry in complex mathematical problem-solving starting in high school. This does not imply a significant overall difference in IQ or abilities across all subjects.

Jerry and Kerry Are 10-Year-Old Twins