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What is the 4 digit number?

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A four-digit number is written in a piece of paper. Can you figure it out?

1. The second isn't a 6.
2. Only one digit starts with a vowel.
3. The fourth is greater than the first, which is greater than or equal to the third, and is greater than the second.
4. Either the first two numbers are even & the last two numbers are odd or vice versa.
5. The difference between the 1st & 2nd, is the same as the difference between the 4th & 3rd.
6. One of the numbers is prime; three are composite.

Hint: In clue 6, the only prime numbers that have a single digit are 2, 3, 5 and 7.
Hint 2: The only numbers that start with a vowel are 1 and 8.
Hint 3: The second is 4.

posted Jun 8 by Afsana Akhter

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1 Answer

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see this link for solution

answer Jun 8 by Hanifa Mammadov

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