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Wolgwang
  • Member for 3 years, 7 months
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9 votes
1 answer
3k views

Formula to find the day of any date in Gregorian calendar derivation.

6 votes
1 answer
423 views

Three married couples on a rectangular table with 6 chairs

4 votes
2 answers
676 views

Find the value of $\theta$ in parallelogram $ABCD$.

3 votes
3 answers
207 views

Find $\int_0^{\infty}\int_{{x}}^{{x}+1} \sin \left({e}^{{t}}\right) {dt} \ dx$

3 votes
2 answers
294 views

Sum of Telescopic Series

3 votes
1 answer
5k views

Number of images formed by two plane mirrors formulae derivation.

3 votes
1 answer
148 views

Number of ways in which exactly one couple sits in front of each other or adjacently on a rectangular table

3 votes
1 answer
336 views

Area of a cyclic quadrilateral.

2 votes
0 answers
79 views

Different value of derivative after applying Leibniz Rule

2 votes
1 answer
96 views

Different Value of Side $BC$ by Similarity and Pythagorean Theorem

2 votes
1 answer
81 views

Finding sum of zeroes of $f(x)$ from $g'(x)=60f(x)$ .

2 votes
3 answers
171 views

Finding plane from from the projection of a line

2 votes
2 answers
251 views

Sum of elements of $A \cap(B \cup C)=400 \times 274$. Find the closed form of $C$.

2 votes
0 answers
59 views

Right Hand Limit involving fractional part

1 vote
2 answers
120 views

Alternate to Vieta's formula to find $a,b,c,d$ in this question.

1 vote
2 answers
724 views

How many $3$-digit numbers are there whose sum of digit is $10$?

1 vote
2 answers
151 views

System of Three Equations - Prove that at least two numbers' absolute value is equal.

0 votes
1 answer
165 views

How many students do not wear glasses and do not bring lunch?

0 votes
2 answers
608 views

Alternate method to solve $\sqrt{11\sqrt{11\sqrt{11...4\, \text{times}}}}$

0 votes
0 answers
28 views

Why two eccentricities from equation of asymptotes?

0 votes
2 answers
75 views

Arithmetic mean of the length of tangents to a circle

-1 votes
2 answers
340 views

Let $a,b$ be positive integers such that $a\mid b^2 , b^2\mid a^3 , a^3\mid b^4 \ldots$.....so on, then prove that $a=b$ -Struck [duplicate]