Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,251

Make 100 using the numbers 400, 200, 50 and 2.

Use the operations + - * / 2 (square) 3 (cube).

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 107,801

Hi;

Welcome to the forum.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,018

400-200-2*50=100

Here lies the reader who will never open this book. He is forever dead.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,251

Bobbym and anonimnystefy, you are both correct!

Now, second equation using PEMDAS:

Make 75 using the numbers 5 5 3.

Use the operations + - * / 2 3.

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 107,801

5 * 5 * 3 = 75

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,251

Correct, bobbym! Anymore solutions?

:

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 107,801

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,018

(5^2)^2/5^2 *3=75

Here lies the reader who will never open this book. He is forever dead.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,251

Great!

What about this?

Numbers 1 2 3

Operations + - x / 2 3

Answer 10

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 107,801

(2^3) + ( 3 -1 ) = 10

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,251

Wow, bobbym! Anymore solutions?

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,018

3^2+2-1

Here lies the reader who will never open this book. He is forever dead.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,251

Okay!

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,251

New:

Answer 10000

Numbers 100 100 1

Operations + - x / 2 3

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 107,801

Hi;

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,251

:

*Last edited by julianthemath (2012-12-18 23:26:44)*

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,251

Okay.

Tricky!

Answer 120

Numbers 5 4 3 2 1

Operations 2 3 !

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 107,801

Hi;

(3+2)!

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,251

Yurp.

Could

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 107,801

Could also be ( 1 + 4 )! or (( 5 + 4 +1 ) / 2)!

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**phrontister****Real Member**- From: The Land of Tomorrow
- Registered: 2009-07-12
- Posts: 4,515

And could also be 1! x 2 x 3 x 4 x 5

"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 107,801

Hi julianthemath;

I missed that you only wanted the operations of factorial and 2 and 3.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,251

Okay!

Numbers 8 7 6 5 4 3 2 1

Operations 2 3 !

Answer 40,320

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline

**muxdemux****Member**- Registered: 2012-12-23
- Posts: 80

How do you do one of those spoiler tags?

Anyway, am I playing this game right?

(8!/7!)*(7!/6!)*(6!/5!)*(5!/4!)*(4!/3!)*(3!/2!)*(2!/1!)

Offline

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,251

Muxdemux, belated welcome to the forum.

Are you sure that is right? I will post a new one soon.

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline