User R K

13

21

votes

1

answer

541

views

(Unsolved) In this infinite sequence, no term is a prime: prove/disprove.

number-theory prime-numbers

Apr 25 '15 at 11:57 Community♦ 1

5

17

votes

5

answers

4k

views

Which of the following is not a prime number?

number-theory prime-numbers

Jan 28 '16 at 3:00 martin 5,469

2

9

votes

5

answers

818

views

In how many ways can a selection be done of $5$ letters?

combinatorics permutations combinations

Sep 22 '15 at 8:26 robjohn♦ 273k

2

9

votes

2

answers

208

views

Checking logarithm inequality.

algebra-precalculus inequality logarithms

Aug 7 '15 at 9:06 Mick 12.2k

6

8

votes

2

answers

1k

views

Find the number of sets of $(a,b,c)$ for $\frac{1}{a}+\frac{1}{b}+\frac{1}{c}=\frac{29}{72}$

algebra-precalculus number-theory quadratics

Jul 22 '15 at 10:12 Christian Blatter 178k

2

7

votes

4

answers

6k

views

Find the number of positive integers solutions of the equation $3x+2y=37$

elementary-number-theory diophantine-equations linear-diophantine-equations

Jan 23 '18 at 0:49 Jud Imhoff 1

1

7

votes

8

answers

279

views

Calculate $\ln 97$ and $\log_{10} 97$

algebra-precalculus logarithms

Oct 19 '15 at 19:23 wythagoras 21.7k

2

6

votes

3

answers

3k

views

Find the next term in the sequence. $\frac{7}{3},\frac{35}{6},\frac{121}{12},\frac{335}{36},\ldots $

sequences-and-series puzzle

May 7 '17 at 20:29 Kushagra Mishra 1

1

6

votes

1

answer

94

views

In how many ways can '$6$' things be distributed equally among $2$ groups?

combinatorics permutations combinations

Sep 12 '15 at 1:28 ncmathsadist 43.3k

3

5

votes

4

answers

3k

views

Find the number of possible solutions in $x+y+z=30$ under conditions.

combinatorics permutations combinations

Jan 14 '17 at 17:34 user402692 1

2

5

votes

3

answers

2k

views

Find the $2000^{th}$ digit of the series $1234567891011121314\cdots $

sequences-and-series combinatorics number-theory

Mar 4 '15 at 5:13 Ritu 720

4

votes

6

answers

307

views

Find the minimum value of $\sin^{2} \theta +\cos^{2} \theta+\sec^{2} \theta+\csc^{2} \theta+\tan^{2} \theta+\cot^{2} \theta$

trigonometry

Sep 29 at 12:59 Blue 50.6k

1

4

votes

1

answer

3k

views

One clock gains, another clock loses time. When will both clocks next show the same time?

algebra-precalculus

Feb 27 '17 at 19:07 David K 56.5k

1

4

votes

6

answers

4k

views

Find the values of $\sin 69^{\circ},\sin 18^{\circ} , \tan 23^{\circ}$

trigonometry

Nov 5 '16 at 15:27 Bhava Nath Dahal 16

1

4

votes

1

answer

199

views

Find the maximum number of people who participated in exactly three games?

combinatorics

Feb 6 '16 at 14:01 R K 987

4

votes

2

answers

13k

views

Solve $x^2-|5x-3|-x<2,\ \ x\in \mathbb{R} $

algebra-precalculus inequality quadratics absolute-value

Aug 29 '15 at 13:00 MissC 53

2

4

votes

2

answers

170

views

Find the number of natural number solutions of $a+2b+c=100$

combinatorics number-theory combinations

Aug 22 '15 at 23:33 N. F. Taussig 46k

2

4

votes

2

answers

135

views

Find the value of $2xy$ .

algebra-precalculus number-theory linear-diophantine-equations

Jul 18 '15 at 15:48 lab bhattacharjee 231k

4

votes

1

answer

1k

views

If $x=(9+4\sqrt{5})^{48}=[x]+f$ . Find $x(1-f)$.

algebra-precalculus radicals

Jun 28 '15 at 19:13 R K 987

1

4

votes

4

answers

1k

views

The number of non-negative real roots of $2^{x}-x-1$ are

algebra-precalculus

Jun 27 '15 at 5:32 Singh 1,188

2

4

votes

4

answers

3k

views

What will be the equation of side $BC$.

geometry coordinate-systems

Jun 2 '15 at 17:25 lab bhattacharjee 231k

4

votes

2

answers

44

views

State if it is a function or relation .

discrete-mathematics

Jun 1 '15 at 0:45 Community♦ 1

2

4

votes

3

answers

460

views

Find the relationship between $a$ and $b$.

geometry coordinate-systems

May 26 '15 at 19:34 Harish Chandra Rajpoot 29.8k

2

4

votes

5

answers

312

views

The value of the logarithmic expression can never be $\ldots$

algebra-precalculus logarithms

Apr 30 '15 at 17:17 Abhishek Bakshi 1,209

4

votes

2

answers

2k

views

Time speed and distance.

algebra-precalculus arithmetic

Mar 6 '15 at 16:07 LaBird 923

1

3

votes

0

answers

24

views

Confusion regarding direct and indirect propotion.

algebra-precalculus ratio

Feb 19 '16 at 19:35 R K 987

1

3

votes

3

answers

224

views

If $A=\sin^{20}\theta +\cos^{48}\theta $ then identify the correct option.

trigonometry

Jan 24 '16 at 5:52 Ángel Mario Gallegos 18.6k

2

3

votes

2

answers

2k

views

Forming a committee from $4$ gentlemen and $4$ ladies with certain conditions

combinatorics permutations combinations

Sep 11 '15 at 7:08 barak manos 38.1k

2

3

votes

3

answers

1k

views

The number of positive integral solutions to the system of equations.

combinatorics algebra-precalculus elementary-number-theory linear-diophantine-equations

Jul 22 '15 at 22:04 mathlove 92.9k

3

votes

3

answers

4k

views

solve $|x-6|>|x^2-5x+9|$

algebra-precalculus inequality quadratics absolute-value

Jul 1 '15 at 17:57 Macavity 36k

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141 Questions

(Unsolved) In this infinite sequence, no term is a prime: prove/disprove.

Which of the following is not a prime number?

In how many ways can a selection be done of $5$ letters?

Checking logarithm inequality.

Find the number of sets of $(a,b,c)$ for $\frac{1}{a}+\frac{1}{b}+\frac{1}{c}=\frac{29}{72}$

Find the number of positive integers solutions of the equation $3x+2y=37$

Calculate $\ln 97$ and $\log_{10} 97$

Find the next term in the sequence. $\frac{7}{3},\frac{35}{6},\frac{121}{12},\frac{335}{36},\ldots $

In how many ways can '$6$' things be distributed equally among $2$ groups?

Find the number of possible solutions in $x+y+z=30$ under conditions.

Find the $2000^{th}$ digit of the series $1234567891011121314\cdots $

Find the minimum value of $\sin^{2} \theta +\cos^{2} \theta+\sec^{2} \theta+\csc^{2} \theta+\tan^{2} \theta+\cot^{2} \theta$

One clock gains, another clock loses time. When will both clocks next show the same time?

Find the values of $\sin 69^{\circ},\sin 18^{\circ} , \tan 23^{\circ}$

Find the maximum number of people who participated in exactly three games?

Solve $x^2-|5x-3|-x<2,\ \ x\in \mathbb{R} $

Find the number of natural number solutions of $a+2b+c=100$

Find the value of $2xy$ .

If $x=(9+4\sqrt{5})^{48}=[x]+f$ . Find $x(1-f)$.

The number of non-negative real roots of $2^{x}-x-1$ are

What will be the equation of side $BC$.

State if it is a function or relation .

Find the relationship between $a$ and $b$.

The value of the logarithmic expression can never be $\ldots$

Time speed and distance.

Confusion regarding direct and indirect propotion.

If $A=\sin^{20}\theta +\cos^{48}\theta $ then identify the correct option.

Forming a committee from $4$ gentlemen and $4$ ladies with certain conditions

The number of positive integral solutions to the system of equations.

solve $|x-6|>|x^2-5x+9|$