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R K
  • Member for 7 years, 3 months
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21 votes
1 answer
598 views

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

18 votes
5 answers
6k views

Which of the following is not a prime number?

9 votes
5 answers
2k views

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

8 votes
2 answers
2k views

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

8 votes
2 answers
216 views

Checking logarithm inequality.

8 votes
4 answers
12k views

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

7 votes
8 answers
341 views

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

6 votes
4 answers
9k views

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

6 votes
1 answer
111 views

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

6 votes
3 answers
4k views

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

5 votes
3 answers
4k views

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

5 votes
6 answers
2k views

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

4 votes
1 answer
695 views

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

4 votes
0 answers
31 views

Confusion regarding direct and indirect propotion.

4 votes
2 answers
5k views

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

4 votes
2 answers
903 views

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

4 votes
1 answer
8k views

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

4 votes
5 answers
409 views

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

4 votes
2 answers
5k views

Time speed and distance.

4 votes
6 answers
6k views

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

4 votes
2 answers
47 views

State if it is a function or relation .

4 votes
4 answers
2k views

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

4 votes
4 answers
4k views

What will be the equation of side $BC$.

4 votes
3 answers
811 views

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

4 votes
1 answer
2k views

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

4 votes
2 answers
15k views

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

4 votes
2 answers
2k views

Find the value of $2xy$ .

3 votes
5 answers
132 views

Solve $2^{a+3}=4^{a+2}-48,\ a\in \mathbb{R}$

3 votes
3 answers
6k views

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

3 votes
2 answers
6k views

Find the equation of line in new co-ordinate system.

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