1. She is sixteen but has a mental age of five.

2. Although Andrew is twenty-five, he has a mental age of six.

3. She is sixteen years old but has a mental age of five.

4. Most of the boys' mental age is about eleven.

5. With a mental age of six months, they suffered cerebral palsy from birth and were both wheelchair-bound.

6. Children with a mental age of 3 years and above can understand the principle and benefit from its use.

7. A medical report estimated she had a mental age of seven years and nine months.

8. A.. There are some people whose physical and mental age is a whole lot younger than their nominal age.

9. An adult who has a mental age of child.

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10. Sarah is almost forty but has a mental age of sixteen.

11. How to find out the man's mental age in a moment?

12. When they grew up, their mental age would still remain a level of child.

13. She suffered brain damage from the car accident and regressed to the mental age of a five-year-old.

14. The most pathetic case was that of a middle-aged man with the mental age of a child of nine.

15. A person of 18 with Down's syndrome and a mental age of four, living with his or her parents?

16. Daughter Helen, 25, needed constant attention after whooping cough left her with a mental age of just two.

17. George Mayo is sixty two, but only has a mental age of six.

18. Person's biological age is young to age, but the person's mental age can be immortal.

19. Brooke Greenberg, who will be old enough to vote next year, has failed to develop physically or mentally and remains just 30 inches tall with a mental age of a one-year-old.