Definitions
Algebros
Math Riddles
SAT Q
Guess the Mathematician
100

An angle whose measure is between 0° and 90° or with less than 90° (or pi/2) radians.

A-CUTE Angle ;)

Acute Angle 


100

The name of this formula: 

y – y1 = m (x – x1)

Point Slope Formula 

100

If you multiply me by any other number, the answer will always remain the same. What number am I?

0

100

If x = 2/3y and y = 18, what is the value of 2x - 3?

21

100

The dude who was known as the "Father of Geometry."  

Euclid 

200

the set of natural numbers – all integers from zero to positive infinity.

whole number 

200

Solve for x and y: 

3x - 5y - 4 = 0

9x = 2y + 7

x = 9/13

y = -5/13

200

I am a three-digit number. My second digit is four times bigger than the third digit. My first digit is three less than my second digit. Who am I?

141

200

4x^2 - 9 = (px + t)(px - t) 

In the equation above, p and t are constants.  What could be the value of p? 


2

200

The dude who was a Greek mathematician, scientist, and physician.  He is most known for his inventions of compound pulleys, antiquity, and screw pump.  

Hint:  He is also the dude who yelled "Eureka" in the bathtub!

Archimedes 

300

A polygon is BLANK if it is both equilateral and equiangular 

Regular

300

Solve, (x-1)2 = [4√(x-4)]2

x = 13 and x = 5.

300

How do you make the number 7 even without addition, subtraction, multiplication, or division?

Drop the "S".

300

How many liters of a 25% saline solution must be added to 3 liters of a 10% saline solution to obtain a 15% saline solution?

1.5 or 3/2

300

The dude was a French mathematician who came up with his own theorem at the age of 16!  The theorem is a triangular arrangement of numbers that gives the coefficients in the expansion of any binomial expression.  He also invented the world's first fully functional mechanical calculator! 

Pascal

400

 A procedure or set of steps used to solve a mathematical computation.

Algorithm 

400

If x = (8ab)/(a+b), then the value of 

(x+4a)/(x-4a) + (x+4b)/(x-4b) is

2

400

If the zookeeper had 100 pairs of animals in her zoo and if two pairs of babies are born for each and every one of the original animals, and then sadly 23 animal don’t survive, how many animals do you have left in total?

977 animal (100 x 2 = 200; 200 + 800 = 1000; 1000 – 23 = 977)

400

A group of friends decided to divide the $800 cost of a trip equally among themselves.  When two of the friends decided not to go on the trip, those remaining still divided the $800 cost equally, but each friend's share if the cost increased by $20.  How many friends were in the group originally?

10

400

The dude who was an Italian mathematician, astronomer, and physicist.  He is most known for his contributions to the sciences of motion, astronomy, and the development of the scientific method.  Not exactly math, but he did discover the four biggest moons of Jupiter and the rings of Saturn.  

Galileo 

500

In geometry, the word that describes a meeting of lines in a common point. 

Concurrence 

500

If we subtract 4 from a digit at unit's place in a 2-digit number and add 4 to digit at ten's place, then resulting number is double. Find the number.

36

500

Can you make 24 from the numbers 3, 3, 8, and 8? You can only use the operations + – x / (). You have to use all four numbers.

8 / (3 – 8/3) = 24.

500

A school's district is forming a committee to discuss plans for the construction of a new high school.  Of those invited to join the committee, 15% are the parents of the students, 45% are teachers from the current high school, 25% are school and district administrators, and the remaining 6 individuals are students.  How many more teachers were invited to join the committee than school and district administrators?

8

500

The dude was a greek mathematician that is considered the "father of trigonmetry."  He is most famous for his incidental discovery of precession of the equinoxes.

Hipparchus 

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