All of them. Every month has at least 28 days.
1 hour. If you take a pill at 1 o'clock, then another at 1.30 and the last at 2'clock, they will be taken in 1 hour.
1 hour. It is a wind up alarm clock which cannot discriminate between a.m. and p.m.
70. Dividing by half is the same as multiplying by 2.
9 live sheep.
The match.
White.
2 apples.
None. It was Noah, not Moses.
You are the driver

1. Consider the trade-story as if it describes two separate trades, where: In the first trade, the man buys something for $60 and sells it again for $70, so he makes a profit of $10. In the second trade, the man buys something for $80 and sells it again for $90, so he makes again a profit of $10.

Conclusion: The man makes an overall profit of $10 + $10 = $20.

You can also look at the problem as follows:

The total expenses are $60 + $80 = $140 and the total earnings are $70 + $90 = $160. The overall profit is therefore $160 - $140 = $20..

2. The man had to reply the number of characters in the word the Doorman was asking. He should have replied "Three" instead of "Five".

3. There are 5 women, 1 man and 14 children.