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#101 2014-02-08 19:28:17

mathaholic
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From: Juliania
Registered: 2012-11-29
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Re: Prime Number Challenges

Okay.

69. p1+c2+p3...+c100=?

70. Is it prime?


"Double the fun, double the thrill, double the coolness" - Julianthewiki

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#102 2014-02-08 22:44:55

bobbym
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From: Bumpkinland
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Posts: 87,248

Re: Prime Number Challenges


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#103 2014-02-10 21:15:27

mathaholic
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From: Juliania
Registered: 2012-11-29
Posts: 2,845
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Re: Prime Number Challenges

Okay.

71. p47 - p46
72. p38 / p27


"Double the fun, double the thrill, double the coolness" - Julianthewiki

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#104 2014-02-10 22:59:01

bobbym
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From: Bumpkinland
Registered: 2009-04-12
Posts: 87,248

Re: Prime Number Challenges

Hi;


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#105 2014-02-12 21:18:01

mathaholic
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From: Juliania
Registered: 2012-11-29
Posts: 2,845
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Re: Prime Number Challenges

73. p2^2
74. add the digits of #73


"Double the fun, double the thrill, double the coolness" - Julianthewiki

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#106 2014-02-12 23:02:46

bobbym
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From: Bumpkinland
Registered: 2009-04-12
Posts: 87,248

Re: Prime Number Challenges


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#107 2014-05-18 12:45:05

mathaholic
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From: Juliania
Registered: 2012-11-29
Posts: 2,845
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Re: Prime Number Challenges

Correct!

# 75 squared

# 76 cubed

# 77 (sum of digits of #75) cubed

# 78 (sum of #76 and #77) raise to the fifth power

# 79 (sum of digits of #78) squared

# 80 Is (sum of digits of #75-79) prime?


"Double the fun, double the thrill, double the coolness" - Julianthewiki

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#108 2014-05-18 12:59:39

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 87,248

Re: Prime Number Challenges


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#109 2014-05-18 13:25:19

mathaholic
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From: Juliania
Registered: 2012-11-29
Posts: 2,845
Website

Re: Prime Number Challenges

# 81. to the four

# 82. prime?


"Double the fun, double the thrill, double the coolness" - Julianthewiki

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#110 2014-05-18 13:28:18

ShivamS
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Registered: 2011-02-07
Posts: 3,557

Re: Prime Number Challenges

Can you explain these a bit? I do not understand the questions.

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#111 2014-05-18 13:32:36

mathaholic
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From: Juliania
Registered: 2012-11-29
Posts: 2,845
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Re: Prime Number Challenges

Okay. I'm sorry, but:

#81. What is 81^4?

#82. Is (Sum of digits of 81^4) prime?


"Double the fun, double the thrill, double the coolness" - Julianthewiki

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#112 2014-05-18 13:36:26

ShivamS
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Posts: 3,557

Re: Prime Number Challenges


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#113 2014-05-18 13:40:38

mathaholic
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From: Juliania
Registered: 2012-11-29
Posts: 2,845
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Re: Prime Number Challenges

I mean sum of digits, like 4+3+0+4+6+7+2+1. Anyways, nice try!

I'll write the items more user friendly.

83. What is 3 to the 5?
84. Multiply that answer by itself.
85. Multiply it by the nth prime (let n be the answer to #83).


"Double the fun, double the thrill, double the coolness" - Julianthewiki

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#114 2014-05-18 13:43:15

ShivamS
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Registered: 2011-02-07
Posts: 3,557

Re: Prime Number Challenges

I missed the sum part, sorry. The question you asked in the last post was clear enough, thanks.

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#115 2014-05-18 13:43:59

bobbym
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From: Bumpkinland
Registered: 2009-04-12
Posts: 87,248

Re: Prime Number Challenges

Hi;


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#116 2014-05-18 13:45:21

ShivamS
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Registered: 2011-02-07
Posts: 3,557

Re: Prime Number Challenges

Please hide your answers bobbym or you will receive an infraction.

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#117 2014-05-18 13:47:30

bobbym
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From: Bumpkinland
Registered: 2009-04-12
Posts: 87,248

Re: Prime Number Challenges

Sorry, latex error.


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#118 2014-05-18 14:01:31

mathaholic
Member
From: Juliania
Registered: 2012-11-29
Posts: 2,845
Website

Re: Prime Number Challenges

It's okay. Time to sharpen our minds!

#86. 1+2+4+8+1+6+3+2+6+4+1+2+8...+1+0+4+8+5+7+6
#87. 1+3+9+2+7+8+1+2+4+3+7+2+9...+3+8+7+4+2+0+4+8+9
#88. 1+5+2+5+1+2+5+6+2+5+3+1+2+5...+9+7+6+5+6+2+5

Note: Give me the pattern first before the sum. Both in separate posts.

#89. Sum of digits of #86-88.

After solving for the sum of 86, 87 and 88, respectively, answer this in a separate post, again.

Last edited by mathaholic (2014-05-18 14:02:41)


"Double the fun, double the thrill, double the coolness" - Julianthewiki

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#119 2014-05-27 22:33:50

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 87,248

Re: Prime Number Challenges

Hi;

I do not understand the questions please explain.


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#120 2014-05-28 01:27:26

ShivamS
Member
Registered: 2011-02-07
Posts: 3,557

Re: Prime Number Challenges

Last edited by ShivamS (2014-05-28 01:27:46)

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#121 2014-05-28 12:35:02

mathaholic
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From: Juliania
Registered: 2012-11-29
Posts: 2,845
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Re: Prime Number Challenges

Hmm, since I'm too lazy to check...

#90. What is the square root of 121?

#91. It's obvious that it's prime. But, does the sum of its digits equal a prime number, too?


"Double the fun, double the thrill, double the coolness" - Julianthewiki

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#122 2014-05-28 12:57:52

ShivamS
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Registered: 2011-02-07
Posts: 3,557

Re: Prime Number Challenges


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#123 2014-05-28 13:47:44

mathaholic
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From: Juliania
Registered: 2012-11-29
Posts: 2,845
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Re: Prime Number Challenges

Whoops, I forgot to specify:

#91. Does the sum of the digits of the answer in #90 prime?


"Double the fun, double the thrill, double the coolness" - Julianthewiki

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#124 2014-05-28 13:49:42

ShivamS
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Registered: 2011-02-07
Posts: 3,557

Re: Prime Number Challenges

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#125 2014-05-28 19:28:55

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 87,248

Re: Prime Number Challenges

Hi;

Should be #92


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

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