A person.

The poison was in the ice, as she slowly drank her one drink, the melting ice released the poison.

7638

It wasn't raining

Hip-Hop.

12 months.

Eggses

$20

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.

Age.

x = some birds flying
x + (x/2) + 1 = 100
(2x + x)/2 = 99
3x = 198
x = 66

1st answer:

Total birds flying = x = 66

That is, if the bird who greeted them hello is just resting and not flying.

2nd answer:

Total birds flying = some birds + another flying bird who greeted them “hello"

Total birds flying = 66 + 1 = 67

20 fore heads

Mushroom.