A) \[IQ=\frac{Mental\text{ }age}{Actual\text{ }age}\times 100\]
B) \[IQ=\frac{Actual\text{ }age}{Mental\text{ }age}\times 100\]
C) \[IQ=\frac{100}{Actual\text{ }age\times Mental\text{ }age}\]
D) \[IQ=\frac{Actual\text{ }age\times Mental\text{ }age}{100}\]
Correct Answer: A
Solution :
\[IQ=\frac{Mental\text{ }age}{Actual\text{ }age}\times 100\] This formula works fairly well for children but not for adults. Different levels of IQ are| Idiot | O-24 | Imbecile | 25-49 |
| Moron | 50-69 | Dull | 70-79 |
| Ordinary | 80-89 | Average | 90-109 |
| Superior | 110-119 | ||
| Most superior | 120-139 | ||
| Geniues | 140 or more |
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