Seven persons were born in different years: 1953, 1963, 1968, 1976, 1990, 1993, and 1998. The base year for calculating their ages is 2019.

- Not more than two persons were born before P.
- Exactly one person was born between V and S, and neither V nor S has an even-numbered age.
- The number of persons born before U is equal to the number of persons born after Q.
- The age difference between T and S is at least 20 years.
- T was born after R but before Q.
- Either P or U has an odd-numbered age.

**Question:** How many persons are younger than U?

Question

Seven persons were born in different years: 1953, 1963, 1968, 1976, 1990, 1993, and 1998. The base year for calculating their ages is 2019.

- Not more than two persons were born before P.
- Exactly one person was born between V and S, and neither V nor S has an even-numbered age.
- The number of persons born before U is equal to the number of persons born after Q.
- The age difference between T and S is at least 20 years.
- T was born after R but before Q.
- Either P or U has an odd-numbered age.

**Question:** How many persons are younger than U?

Accepted Answer

**Solution:**

1. **List of birth years:** 1953, 1963, 1968, 1976, 1990, 1993, 1998.

2. **Calculate ages in 2019:**
   - 1953 → 66 years
   - 1963 → 56 years
   - 1968 → 51 years
   - 1976 → 43 years
   - 1990 → 29 years
   - 1993 → 26 years
   - 1998 → 21 years

3. **Condition: Not more than two persons born before P.**
   - This means P is either 3rd or earlier in ascending order of birth years.

4. **One person between V and S, and both have odd ages.**
   - Odd ages from above: 51 (1968), 43 (1976), 29 (1990), 21 (1998)
   - V and S must be among these with exactly one person between them.

5. **Number of persons born before U equals number born after Q.**
   - This implies U and Q are positioned symmetrically in the order.

6. **Age difference between T and S is at least 20 years.**
   - T is born after R but before Q.

7. **Either P or U has an odd age.**

8. **Arranging all conditions, the order of birth years (ascending) is:**
   1953 (oldest), 1963, 1968, 1976, 1990, 1993, 1998 (youngest).

9. **Assigning persons to years based on conditions leads to:**
   - P is among the first three (oldest).
   - V and S are placed with one person between them, both having odd ages.
   - U and Q are positioned so that the number of persons before U equals those after Q.

10. **Counting persons younger than U:**
    - From the arrangement, more than three persons are younger than U.

**Answer:** More than three

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