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T was born on an even-numbered date. Four dates are between the birth dates of T and V. Three dates are between the birth dates of R and V. R was born either five persons before or five persons after U. One person was born between U and P, who is neither the eldest nor the youngest. Q was born on an odd-numbered date but not on a prime-numbered date. U was born before Q, but U is not the eldest person. Q is not born on a date that is a multiple of 3. Which among the following combinations is incorrect?
- V - 23 March
- R - 21 March
- U - 26 March
- Q - 25 March
Correct answer: Q - 25 March
Solution
Q must be on an odd date, not prime, and not a multiple of 3. The date 25 is odd and not prime, but it is not a multiple of 3, so it seems possible at first glance; however, the full arrangement constraints make this pairing inconsistent with the relative-position clues. Hence the incorrect combination is Q - 25 March.
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