Facts
What animal once lived without its head for 18 months?
a chicken
Unit Conversion
There are _____cm in 42m.
4,200 cm
(100 cm = 1 m)
Find the difference between "7 squared" and "double 7".
35
"7 squared" is multiplying 7 by 7 (which is 49) and "double 7" is multiplying 7 by 2 (which is 14). The word difference tells us to subtract, so 49-14=35.
Name all the colors in the rainbow.
red, orange, yellow, green, blue, indigo, violet
Square root of 50 is in between which two integers? Why? Which integer is it closer to on a number line?
Square root of 49 is 7, square root of 64 is 8, so the two integers are 7 and 8 because 50 is in between 49 and 64.
On a number line, square root of 50 would be closer to 7 because the difference between 49 and 50 is only 1 while the difference between 50 and 64 is 14.
What is my favorite color?
The world record for the longest underwater breath hold is between which two consecutive multiples of 10 minutes?
Between 20 and 30 minutes.
(24:37 to be exact!)
PEMDAS
Delta Math
Delta Math
Find the sum of the squares of the even numbers from 1 to 10.
220
22 + 42 + 62 + 82 + 102
4 + 16 +36 + 64 + 100 = 220
MENTAL MATH
856 X 350
299,600
Define integer.
A whole number (no fractions/decimals) that can be positive, negative, or zero.
What is my favorite food?
Mac n cheese
What animal will laugh if you tickle it?
a rat
Prime Numbers
List the prime numbers from between 1-30
2, 3, 5, 7, 11, 13, 17, 19, 23, 29
Solve the system of equations for x and y:
x+2y=12
x=2y
x=6, y=3
Who was the second US President?
John Adams
Provide two examples of irrational numbers and explain why they are irrational.
An irrational number is any non-terminating decimal number in which there is no pattern.
Potential answers: Pi (3.14159...), square root of 2 (1.41421...), e (2.71828...)
What month is my birthday?
September
What animal is 30 times more likely to be struck by lightning than humans?
Giraffe
MENTAL MATH: Powers
63 = ?
216
Find a value of x that satisfies both inequalities:
5(x + 2) - 3(x - 4) < 20 and
-5x + 7 + 2x - 13 < -2(3 + x) + 9
Any number between -9 and -1, but not including -9 or -1 will satisfy both inequalities.
Solution to first inequality: x < -1
Solution to second inequality: x > -9
What is the fourth planet from the sun?
Mars
Which statement is true and why?
1) All squares are rectangles.
2) All rectangles are squares.
Definition of a rectangle: four-sided shape with all internal angle measures equal to 90.
Definition of a square: four-sided shape with all internal angle measures equal to 90 AND all four sides equal in length.
It is possible to have a rectangle with four equal sides, so statement 1 is true. (Statement 2 cannot always be true because if a rectangle does not have four equal sides than it cannot be a square)
6th grade: Mrs. Smith
7th grade: Mrs. Morey
8th grade: Mrs. Hynick
How old is the Earth in billions of years?
About 4.5 billion years old.
Divisibility rule
Explain why 323,232,323,232 is divisible by 6 (without showing the long division or using a calculator)
Numbers that are divisible by 2 and 3 are divisible by 6. 323,232,323,232 is divisible by 2 because it is an even number. 323,232,323,232 is divisible by 3 because the sum of the digits is 30 which is a multiple of 3.
Find the exact average (mean) of this list of numbers:
18, 55, 101, 96, 55, 18, 22, 23, 22, 57, 88
50.4545454545454545.....
The only part of the human body which does not grow in size from birth to death is the __________ .
Stapes (the innermost ear ossicle)
What is the difference between "expression" and "equation"
An expression is a number, a variable, or a combination of numbers and variables and operation symbols. An equation is made up of two expressions connected by an equal sign.
What are my siblings' names?
Susan, Matt, Brian