Math Is Fun Forum

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Can U solve this?

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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.

mathaholic

Member

From: Earth

Registered: 2012-11-29

Posts: 3,251

Re: Can U solve this?

Good!
Example:

T[sub]4[/sub] means that you need to get the 5th triangular number because T[sub]0[/sub] is 1, the first triangular number.

Okay!
Next question:
Numbers 3 4 5
Operations T +
Answer 46

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Can U solve this?

Hi;

The first triangular number is 0, so T0 = 0.

But using your definition we can say

T3 + T4 + T5 = 46

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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.

mathaholic

Member

From: Earth

Registered: 2012-11-29

Posts: 3,251

Re: Can U solve this?

Oh. My classmate taught me that T thing.

Number 14 28 42
Operation + - [sup]2[/sup]
Answer 1764

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Can U solve this?

42^2 = 1764

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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.

mathaholic

Member

From: Earth

Registered: 2012-11-29

Posts: 3,251

Re: Can U solve this?

New edition :

P * C.P = 5

P = Prime
C = Composite

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

Agnishom

Real Member

From: Riemann Sphere

Registered: 2011-01-29

Posts: 24,996

Website

Re: Can U solve this?

it can't be.

5 = 5*1 and there isn't any other factorisation

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'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Can U solve this?

Hi julianthemath;

5 only has the factorization of 5 x 1. 1 is not composite or prime. Please post another problem this one has no solution.

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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.

mathaholic

Member

From: Earth

Registered: 2012-11-29

Posts: 3,251

Re: Can U solve this?

C.P means decimal number. Try again.

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

mathdad

Member

Registered: 2013-04-13

Posts: 21

Re: Can U solve this?

New edition :

P * C.P = 5

P = Prime
C = Composite

Still not possible. 

All P are such that P > 1. The smallest P is 2. And, the smallest C such that C > 0 is 4

Thus P * C.P >= 2 * 4.d = 8.0 + 2d (where 2d is 2 times the decimal part)

If you were trying to go for 2 * 2.5, then the 2 in 2.5 is not Composite, it is Prime.

Last edited by mathdad (2013-04-22 09:04:17)

mathaholic

Member

From: Earth

Registered: 2012-11-29

Posts: 3,251

Re: Can U solve this?

Oh, well.

No answers, no points.

Wanna ask, mathdad? bobbym? Or just keep me?

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Can U solve this?

Hi;

Okay, let me see the answer. Please hide the answer cause someone else may still want to work on it.

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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.

mathaholic

Member

From: Earth

Registered: 2012-11-29

Posts: 3,251

Re: Can U solve this?

81 + X - 4 = 85

Solve for X.

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Can U solve this?

Hi;

Thanks for the answer.

X = 0

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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.

mathaholic

Member

From: Earth

Registered: 2012-11-29

Posts: 3,251

Re: Can U solve this?

Again!

81 + X - 4 = 85

You might have an error.

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Can U solve this?

H;

81 + X - 4 = 85

Add 4 to both sides:

81 + X = 89

Subtract 81 from both sides.

X = 8

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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.

mathaholic

Member

From: Earth

Registered: 2012-11-29

Posts: 3,251

Re: Can U solve this?

Wow.

1777 - 777 + 777 * 777 = ?

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Can U solve this?

604729 is the answer.

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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.

mathaholic

Member

From: Earth

Registered: 2012-11-29

Posts: 3,251

Re: Can U solve this?

Wow!

This time, there are points.

X + X = X

What makes this impossible to answer? 30 points

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Can U solve this?

Nothing, X can be 0.

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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.

mathaholic

Member

From: Earth

Registered: 2012-11-29

Posts: 3,251

Re: Can U solve this?

Oh. How do you like my signature? Funny, right?

Bobbym - 30

3 6 9 15 ? What is the fifth number?

Last edited by julianthemath (2013-04-25 21:01:50)

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Can U solve this?

I like 21 as the nest number.

I worked a long time on bobbym - 30 but could not come up with anything.

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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.

mathaholic

Member

From: Earth

Registered: 2012-11-29

Posts: 3,251

Re: Can U solve this?

Oh.

Bobbym - 60

If China has a population of 1,234,567,890,
India 123,456,789
USA 12,345,678
Indonesia 1,234,567
What is the population of Brazil?

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Can U solve this?

Is it 123 456 ?

How are the chickenpox?

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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.

mathaholic

Member

From: Earth

Registered: 2012-11-29

Posts: 3,251

Re: Can U solve this?

No. I didn't have it, my cousins do. The start of the infection was during the afternoon I came home after my last exams. And now, some of my cousins are having the chickenpox. So, I just need to stay inside.

Yes. It is 123,456.

Bobbym - 90

If Gangnam style were a country (by no. of views), what rank is it?

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