Math and Arithmetic

Math is the study of abstractions. Math allows us to isolate one or a few features such as the number, shape or direction of some kind of object. Then we can study what can be learned about the behavior of those features while ignoring everything else about the object.

Math and Arithmetic
Numbers

Can the denominator of a rational number be zero?

No. Zero cannot be a denominator for any number.

Math and Arithmetic
Algebra
Length and Distance

Which of the following items are required ona 12 foot inflatable dinghy?

A PFD for everyone onboard

Math and Arithmetic
Rounding and Estimating Numbers

What is 140 rounded to the nearest whole number?

It's already there.

Math and Arithmetic

What is the difference 1 -9?

1-9=8 1+9=10

Math and Arithmetic
Algebra
Geometry

If two segments are parallel are the lines containing them are coplanar?

Parallel lines -> ||

Math and Arithmetic
Algebra
Length and Distance

40cm is what percent of a meter?

40%

Math and Arithmetic

What is the meaning of 4000 key depressions per hour?

It is a measure of speed on a keyboard or other instrument on which keys are pressed down (depressed).

Math and Arithmetic

How many 3s in 313433535333?

There are 18 - 21 three's depending on which picture you are looking at.

Math and Arithmetic
Baking
Temperature

What is 350 F in degrees C?

Math and Arithmetic

If you are 13 years old when were you born?

You can calculate the year you were born if you subtract your age from the present year. For example, if you are 13 years old, and it is currently the year 2010, you were probably born in 1997; and if you are 13 years old in 2011, you were probably born in 1998.

School Subjects
Math and Arithmetic
Temperature

What is -40 degrees Celsius to Fahrenheit?

They are the same in this case

F = 9/5 C + 32 = 1.8(-40) + 32 = -40F

Math and Arithmetic
Goats and Sheep

A farmer has 19 sheep All but 7 die How many are left?

If you red the question carefully, you can see that it clearly says ALL BUT 7. So, 12 sheep died, leaving 7 left.

Math and Arithmetic

What is 8 divided by 2(2 plus 2)?

8÷2(2+2)=?

8÷2×4=?

4×4=16

8÷2(2+2)=16

Math and Arithmetic

How do you write 0.2 in word form?

You could write "zero point two".

You could write "two-tenths".

Math and Arithmetic
Brain Teasers and Logic Puzzles
Algebra

There is a bus with 7 children inside. Each child has 7 bags. Inside each bag there are 7 big cats. Each big cat has 7 small cats. All cats have 4 legs each. How many legs are on the bus?

As a riddle, the answer is zero legs on the bus since the bus has wheels instead of legs.

But as a maths problem; It's not a tricked question -- just a straightforward maths problem

Confirmed answer is 10990 legs.

§ Let's say the whole situation simply :

- There are 7 girls.

- Each girl has 7 backpack

- Each backpack has 7 big cats

- Each big cat has 7 little small cats.

§ Question: How many legs are there in the bus?

§ Let's focus on each part of the question systematically, write down on a piece of paper if you have to, following my steps of chains.

1. Focus on the first girl first:

A B C D E F G

Girl A has 7 backpacks

2. Now focus on first backpack A1 :

A1 A2 A3 A4 A5 A6 A7

Backpack A1 has 7 big cats

3. Now focus on first big cat :

1 2 3 4 5 6 7

Ø Each big cats have 7 small cats (that's the end of the focus)

Systematically, 7 small cats has 28 legs (7 * 4) combined with the big cat that owns this 7 small cats.

Let's call this the "cat chain", so cat chain 1has 32 legs altogether.

Ø So since there are 7 big cats

7 * 32 = 224 legs

Ø Therefore each backpack has 224 legs

Ø Finally, each girl has 7 * 224 = 1568 legs.

Lastly, since there are 7 girls, A to G, there are 7 * 1568 legs (per girl) = 10976 legs.

Now, since each girl also has 2 legs each;

SO, (7 * 2) + 10976 = 10990 legs altogether

Note: Disregarding bus driver, buses and etc…Only focus on the girl and their backpacks!

Or

There are 7*7 = 49 bags and there are 7 + 7*7 = 56 cats in each bag, meaning there are 56*4 = 224 legs in each bag. So including the 7 children that have 2 legs each, there are 7*2 + 49(224) = 10990 legs in total.

Math and Arithmetic
Technology
Computer Monitors

How 1600 x 1600 pixels in inches?

There is no way to give a real answer for that. Pixels do not have a consistent size, so they can't be universally converted. Pixels change size depending on the density of the thing displaying them (72 dots per inch is typical for screens and 300 dpi is typically selected for something that will be printed as form of Quality Photo). For screens size differs based on "Pitch" of the screen(distance between two consecutive pixels) thus even small screens with low pitch value can display high resolutions!

However, to simply measure the width and height of your monitor at high accuracy just use the "Jruler" application

Download JRuler from here:
JRULER

Temperature
Math and Arithmetic

Bake 375 F is equal to C?

190.5 degrees Celsius

Entertainment & Arts
Math and Arithmetic
Communication
Oprah Winfrey

What can travel around the world while staying in a corner?

Stamp

Math and Arithmetic

9 times 8?

72

Math and Arithmetic
Units of Measure
Cooking Measurements
Volume

How many pints are in one quart?

Two pints equal one quart.

Math and Arithmetic
Prime Numbers
Numbers

The square of certain number exceeds 24 by 5 times the numberwhat is the number?

x2-5x-24=0 (x+3)(x-8)=0 x=8,-3 putting the value 64-40-24=0 64-64=0
Math and Arithmetic
Algebra

How many times does 4 go into 36?

9

Math and Arithmetic

How many times does 4 go into 100?

10

School Subjects
Math and Arithmetic
Geometry

How many edges does a rectangular prism have?

A rectangular prism (a cuboid) has 12 edges (also 6 faces and 8 vertices).
A rectangular prism has 12 edges 12 12 edges A rectangular prism has eight (8) edges.

It's a 688!


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