Puzzles

answers at the bottom.

1]
Can you find a five digit number which has no zeros no digit is repeated, where:

The first digit is a prime number.
The second digit is the fifth digit minus the first digit.
The third digit is twice the first digit.
The fourth digit is the third digit plus three.
The fifth digit is the difference between the first digit and the fourth digit.

2]
Find a number whose double exceeds its half by exactly 99.

3]
James said that he was born on February 29, 1900. What birthday will he celebrate in the year 2000?
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Answers…

1] 23475
2] 66
3] James was lying, 1900 was not a leap year.

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