Q: How many stomachs does a cow have?

A cow has 1 stomach with 4 compartments namely, rumen, reticulum, omasum and abomasum.
Source : http://www.dairyfarmingtoday.org

Q: Are all cows female?

True. All cows are females, males are called bulls.

Q: How many percent of the milk in the world do cows supply?

90%

Q: How many years after giving birth can a cow produce milk?

6 Years .
Source : http://www.livestockexpo.org/education/curriculum/downloads/dairy_information.pdf

Q: Who is a Maitre d’?

Maître d': The person who shows diners to their tables and supervises the waiters in a restaurant.

Q: What is the most popular internet activity?

Sending email topped at 91% followed by using a search engine to search for information which is 90%.

Q: Most gemstones contain several elements. What is the exception?

The diamond. It's all carbon. Diamonds are the hardest substance known to man.

Q: Why is there high & low tide?

There is a high and low tide because of our moon and the sun. As the moon travels around the earth and as they travel together round the sun, the combined gravitational forces cause the world's oceans to rise and fall.

Q: What is the name of the imaginary line that divides Earth into two halves?

Equator. Singapore is near the equator.

Q: What happens when you mix vinegar and baking soda?

Used separately, each of them is a very good surface cleaning agent. When mixed, the baking soda (a base) and vinegar (an acid) react
to make a gas which makes bubbles and forces the mixture out of the container good for making a chemical volcano.