book Maths Puzzle Numerical Ability

3 whole numbers, product odd, sum even?

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book Other Question

What is Expanding logarithms and how do i do this problem?
ln((e^(4)y)/(d^(2))
what is the meaning of conditional statement. what is the two parts of it and also can you please define "converse" and "inverse". please also define the following:
1. contrapositive
2. tauthology
3. contradiction
4. logical equivalence