You are given a 10x10x10 cube composed of one thousand 1x1x1 "mini-cubes" glued together. If the outer most layer falls off, how many "mini-cubes" would have fallen off?
Hint: Think about one face at a time.
You started with 10x10x10 = 1000 cubes. The outer layer falling off will leave you with 8x8x8 = 512 cubes, which means 488 cubes have fallen off.
A family photo contained:
one grandfather, one grandmother,
two fathers, two mothers,
six children, four grandchildren,
two brothers, two sisters,
three sons, three daughters,
one father-in-law, one mother-in-law, one daughter-in-law.
29 people you may think, but no! What is the fewest number of people that could have been in the photo?
Hint: A single member of the family can be both a sister and a daughter.
Four children (2 boys and 2 girls), their mother and father, the mother's mother, and the father's father.
What is represented by this BrainBat?
Hint: Say what you see.
Answer: Octopi, which is one of the plurals of the word Octopus, the others being Octopuses and Octopodes.
Using the BrainTracker grid below, how many words can you find? Each word must contain the central W and no letter can be used twice, however, the letters do not have to be connected. Proper nouns are not allowed, however, plurals are. Can you find the nine letter word?