Math
Do 11*13 in your head.
What is 143?
What is the least common multiple of 21 and 3.
What is 63?
Do 1/2+2/4 in you head.
What is 3/4?
A branch of mathematics dealing with symbols and the rules for manipulating those symbols.
What is Algebra?
The only month that is 3 letters in English.
What is May?
Do 153/9 in your head.
What is 17?
Do 11*53 in your head, (use the 11 trick, it's fastest.)
What is 583? The 11 trick is when you put the 53 as 5_3, you add 5+3, and get 8. Thus, 583.
Solve 255/5 in your head.
What is 51?
Check if (x-1)2-(2x+1) works for 21*21 in your head.
What is no? The actual equation is (x-1)2+(2x-1).
The only planet not named after a god
What is Earth?
Solve 3x-41=5x+23 for x.
What is x=-32?
Solve 2x+32=6x+12
What is 5?
Do 15*17 in your head.
What is 255?
The purpose of number theory.
What is to help discover interesting relationships between different sorts of numbers?
The year the constitution was signed.
What is 1787?
Find the greatest common factor of 165 and 33.
What is 11?
14/8 divided by 5/4, (you can make it an improper fraction, but you must simplify.)
What is 7/5, or 1 2/5.
Solve for x and y.
6x-18=2y
4x-10=2y
What are x=4 and y=3? Simply subtract the second equation from the first, which gives you 2x-8=0, which means x is 4. Then, plug in 4 for one of the equations as x, and solve for y.
Name 4 main divisions of math.
What are Foundations (including set theory and mathematical logic), Number Theory, Algebra, Combinatorics, Geometry, Topology, Mathematical Analysis, Probability, and Statistics?
The most visited country in 2020.
What is France?
The greatest common factor of 1560 and 240, (It's not 10.)
What is 120?
Solve x2-2x-3=0, (hint, there are 2 answers.)
What is -1 and 3? Factor x2-2x-3, and you get (x-3)*(x+1)=0. Then make x-3 equal zero, and x+1=0, which gives you 3 and -1.
The least common multiple of 16 and 14, (It's not 224.)
What is 112? 16*7=112, and 14*8=112.
The person who is considered to be the father of Geometry.
Who is Euclid?
Earth's circumference, (within 5,000 miles, or 8047 km.)
What is 24,901 mi, or 40,075 km?