Answer:

1. If the weather is good, then the picnic will be enjoyable.

H - the weather is good.

C - the picnic will be enjoyable.

2. If you are good in mathematics, then you are smart.

H - you are good in mathematics.

C - you are smart.

3. If a number is even, then it is divisible by two.

H - a number is even.

C - it is divisible by two.

Hope it helps:)