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Two boys have an I.O. of 120. It can be concluded that

  • A.both boys would be successful in high school and college.
  • B.these boys have equal mental ages.
  • C.the parents of both are above average in intelligence.
  • D.none of these is necessarily true.

Answer: D

For two boys with an IQ of 120, none of these is necessarily true.

An IQ is a ratio of mental age to chronological age and does not tell success, the parents' ability or the mental ages themselves.

Success in school depends on motivation and opportunity. The mental ages are equal only if the chronological ages are the same, which is not given. Parents' intelligence is not fixed by a child's IQ. So none of the first three statements must follow.

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