Mr. and Mrs. Webster were on a holiday shopping excursion. On their way to the car after leaving the store, Mr. Webster complained he was tired from carrying so many packages. Mrs. Webster, the kindly thing that she was, replied, “Quit your complaining Walter! If you gave me just one of your packages, I’d have twice as many as you. And if I gave you one of mine, we’d have the same.”
How many packages were Mr. and Mrs. Webster each carrying?
Imagine an HIV test that is 95% accurate (false positive rate of 5%) and around 2% of the tested population is infected with HIV. What is the probability that you actually have HIV when your test comes back positive?
It can’t be touched, but can be felt.
It can’t be opened, but can be gone into.
Those who seek it always find it under something,
yet it moves from place to place.
Shade. You can’t touch shade, but you can feel its coolness. You can’t open shade but you can go into it. If you’re looking for shade it always has to be underneath something to block the light and shade moves as the light does.
Ten seconds is 1/6 of a minute and 1 minute is 1/60 of an hour, so 10 seconds is 1/360 of an hour.
If you graph her trip with the speed on the y-axis and the time on the x-axis, you get a triangle with height of 60 mph and width of 1/360 of an hour. To calculate the area of the triangle, you multiply 1/2 × 1/360 × 60 = 1/12.
Pair these words to make nine titles of books by Charles Dickens:
A LITTLE 1 RUDGE
B PICKWICK 2 COPPERFIELD
C EDWIN 3 TIMES
D BARNABY 4 CHUZZLEWIT
E NICHOLAS 5 PAPERS
F HARD 6 HOUSE
G BLEAK 7 DROOD
H DAVID 8 DORRIT
I MARTIN 9 NICKLEBY
A 8 = LITTLE DORRIT
B 5 = PICKWICK PAPERS
C 7 = EDWIN DROOD
D 1 = BARNABY RUDGE
E 9 = NICHOLAS NICKLEBY
F 3 = HARD TIMES
G 6 = BLEAK HOUSE
H 2 = DAVID COPPERFIELD
I 4 = MARTIN CHUZZLEWIT