Grandma has an old-fashioned refrigerator with a very small freezer compartment which can hold up to seven ice cube trays stacked but there are no shelves to separate the trays. You have fifteen trays each of which can make a dozen cubes but if you stand one tray on top of another before it's frozen it will sink into the lower tray and you won't get full cubes from the lower tray. Without using anything but water and the ice cube trays what is the fastest way to make full ice cubes in seven trays?
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Many Words From One
There is a common English word that is nine letters long. Each time you remove a letter from it it still remains an English word - from nine letters right down to a single letter. What is the original word and what are the words that it becomes after removing one letter at a time?
I am the center of gravity
I am the center of gravity hold a capital situation in Vienna and as I am foremost in every victory am allowed by all to be invaluable. Though I am invisible I am clearly seen in the midst of a river. I could name three who are in love with me and have three associates in vice. It is vain that you seek me for I have long been in heaven yet even now lie embalmed in the grave. What am I?
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