For real numbers and , define . What is ?
-72
The two legs of a right triangle, which are altitudes, have lengths and 6. How long is the third altitude of the triangle?
3
How many positive cubes divide 3!⋅5!⋅7!?
6
The least common multiple of a positive integer n and 18 is 180, and the greatest common divisor of n and 45 is 15. What is the sum of the digits of n?
6
Of A and B this is the lore:
When added they make 24.
If A over 3,
is A over B,
What's A + 2B plus 2 more?
How many solutions, you implore?
1 or 2, I forgor...
29 or 50
Let and denote the solutions of . What is the value of ?
0
Consider the rectangle ABFE as shown in the figure below. ABCD is a square. If CG = 1 and GD = 2, then what is the perimeter of the rectangle ABFE?
15
Coin A is flipped three times and coin B is flipped four times. What is the probability that the number of heads obtained from flipping the two fair coins is the same?
35/128
For how many (not necessarily positive) integer values of is the value of an integer?
9
In this magic square, there is exactly one way to fill the empty squares so that every row, every column, and both main diagonals add up to the same value. What is that value?
21/2
Draw the circle x2 + y2 = 1, then draw the line through the "North Pole" (0,1) meeting the x-axis at (2,0). What is the x coordinate of the other point where the line meets the circle?
4/5
The centers of the faces of a right rectangular prism (dimensions 3x4x5) are joined to create an octahedron. What is the volume of this octahedron?
10
A player pays $5 to play a game. A die is rolled. If the number on the die is odd, the game is lost. If the number on the die is even, the die is rolled again. In this case the player wins if the second number matches the first and loses otherwise. How much should the player win if the game is fair? (In a fair game the probability of winning times the amount won is what the player should pay.)
$60
Claudia has 12 coins, each of which is a 5-cent coin or a 10-cent coin. There are exactly 17 different values that can be obtained as combinations of one or more of her coins. How many 10-cent coins does Claudia have?
5
FREE POINTS!!!
FREE POINTS!!!
What is the length of the shortest path that starts at (2, 1), touches the x-axis, then returns to some point on the line y = 1/2 x?
sqrt(80)/5
or
4sqrt(5)/5
A wire is cut into two pieces, one of length "a" and the other of length "b". The piece of length "a" is bent to form an equilateral triangle, and the piece of length "b" is bent to form a regular hexagon. The triangle and the hexagon have equal area. What is a/b?
sqrt(6)/2
When 7 fair standard 6-sided dice are thrown, the probability that the sum of the numbers on the top faces is 10 can be written as where n is a positive integer. What is n?
84
Define a sequence recursively by and the remainder when is divided by for all Thus the sequence starts What is
9
Mr. League hosts a banquet for Walton STEM staff. The table is a square that can seat 2 people on each side, and each seat is numbered from 1 to 8. A red tablecloth is put on one half, and a blue tablecloth is put on the other half. 4 staff and 4 spouses arrive. Staff must sit on the red side, and the spouses must sit on the blue side. If staff are not allowed to sit next to their spouses, how many unique seating arrangements are possible?
336 (might be wrong)
Suppose that is an arithmetic sequence withWhat is the value of
0.01
Three unit squares and two line segments connecting two pairs of vertices are shown. What is the area of △ABC?
1/5
Three distinct vertices of a cube are chosen at random. What is the probability that the plane determined by these three vertices contains points inside the cube?
4/7
Elmo makes N sandwiches for a fundraiser. For each sandwich he uses B globs of peanut butter at 4 cents per glob and J blobs of jam at 5 cent per blob. The cost of the peanut butter and jam to make all the sandwiches is $2.53. Assume that B, J, and N are positive integers with N>1. What is the cost of the jam Elmo uses to make the sandwiches?
$1.65
Let ∆ represent the difference between the largest possible sum and the smallest possible sum of all visible faces on a dice configuration. Imagine a construction like the one below but where the number of ’holes’ is not 5 but some larger number g. If ∆ = 492 for that construction, what is the number of holes (g)?
47 holes