$400.

I bought 1 cow for $800.
I sold it for $1000.
Then, earned $1000 – $800 = $200

I bought it again for $1100.
I sold it again for $1300.
Then, earned $1300 – $1100 = $200

10

2 + 5 = 3 + 4

Pulls her in the bush to keep her safe.

11 times. It chimes at zero and then once every second for 10 seconds.

25

The probability is 1/3 (about 33%).

888 +88 +8 +8 +8 =1000

Let two parts are 100 - x and x
Then (100 - x)/4 = x/3 + 11
=> 25 - 4/x = x/3 + 11
=> 25 - 11 = x/3 + x/4
=> 14 = 7/12 x => x = 14 * (12 /7) = x
=> x = 24
=> 100 - 24 = 76

The two parts are 24 and 76

22; in half of the circle there are 11 children because 18-7=11. Multiply 11x2=22!

98 - 02 * 1 = 96

There are several answers.

One potential answer is: 31 quarters, 21 dimes, 3 nickels, and 0 pennies.