1. There are 880  animals on a farm. Three-fourths of them are cows. Of the cows, about 70% are white. How many cows on the farm are not white?   462   264   198   220   660   Hint Half-n-half Clue   2. If a and b are both odd numbers, then which of the following must be an odd number ?   ab   a + b + 2   2a + b + 1   a + b   ab + 1   Half-n-half Clue   3. The length of the line segment connecting point A (-4, 12) and point B (-12, 6) is   100   14   8   10   6   Half-n-half Clue   4. A piece of equipment consumes c cents per hour of fuel and requires d dollars per hour for other operational costs. What is the cost in dollars of operating the equipment for 600  hours?   600 (c + d)   0.01 c + d   6 (c + d)   600 c + 6 d   6 c + 600 d   Half-n-half Clue