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Math Through Time!
Big Brain Math
Fifth Grade Math
This is too difficult, don't even try it
100

A class of 28 students is divided into groups of 4 for a project. How many groups will there be?

Seven groups

100

Name a simple tool people used for counting long ago, that wasn't paper or a pencil.

Fingers, toes, stones, or tally marks

100

What is the value of 15 times (20 minus 16)

60

100

Which is greater: 0.6 or 0.58?

0.6

100

Which ancient civilization developed Roman numerals?

Romans 

200

What type of angle is exactly 90 degrees?

Right angle

200

What unit of measurement for time has 60 seconds?

Minute

200

If a square has a perimeter of 32 centimeters, what is the length of one of its sides?

8 centimeters

200

In the equation 15−3×2=?, which operation should you do first?

Multiplication

200

What symbol is often used to represent an unknown quantity in algebra?

A letter, most commonly x

300

What is the name of a shape that is round like a ball? (Not a circle)

A Sphere

300

What number is halfway between 25 and 75?

50

300

What is the next number in the sequence: 2, 6, 18, ___?

54

300

Arrange the following numbers from greatest to least: 1.2, 0.95, 1.08, 1.5

1.5, 1.2, 1.08, 0.95

300

What ancient counting tool uses beads on wires or rods?

Abacus

400

What is the name for a three-dimensional shape with two parallel circular bases connected by a curved surface?

Cylnder

400

How many seconds are in 3 minutes?

180 seconds 

(3 minutes x 60 seconds/minute = 180 seconds)

400

What is the largest three-digit number you can make using the digits 2, 8, and 5 only once?

852

400

If 2/of the students in a class of 30 are wearing blue shirts, how many students are wearing blue shirts?

12 students

400

David ran 3.7 kilometers on Monday and 2.9 kilometers on Wednesday. How many kilometers did he run in total?

6.6 kilometers

500

What is 100 more than half of 600?

400

500

What does the abbreviation "AD" stand for in historical dates, which also relates to a point in time used for reference in some historical timelines?

Anno Domini (Latin for "in the year of our Lord")

500

If you count by hundreds starting from 34, what is the third number you will say?

234 

(34, 134, 234)

500

If a store is having a 20% off sale on an item that originally costs $30, what is the sale price?

$24

500

What symbol is used to represent a fraction?

A horizontal line (vinculum)