Skip to main content
Vidyanshu Mishra's user avatar
Vidyanshu Mishra's user avatar
Vidyanshu Mishra's user avatar
Vidyanshu Mishra
  • Member for 7 years, 9 months
  • Last seen more than 1 year ago
37 votes
Accepted

Is every parallelogram a rectangle ??

25 votes

Can a right triangle have odd-length legs and even-length hypotenuse?

20 votes

I take it so long everytime I learn mathematics myself. What should I do?

19 votes
Accepted

All other prime gaps (except between $2$ and $3$) are even.

16 votes

I'm looking for some mathematics that will challenge me as a year $12$ student.

15 votes
Accepted

Consecutive Numbers are coprime

15 votes

Prime Numbers And Perfect Squares

15 votes
Accepted

Show that if $2+2\sqrt{28n^2+1}$ is an integer then it must be perfect square.

13 votes
Accepted

If $ax^2+bx+c=0$ has rational roots then $(a+1)x^2+bx+c=0$ cannot have rational roots

13 votes
Accepted

If $p$ is a prime number,show that $2(p-3)!+1$ is a multiple of $p$.

11 votes

How to get inverse of formula for sum of integers from 1 to n?

11 votes
Accepted

The sum of digits in a 2-digit number

10 votes

How do you convince someone that parallel lines can touch/meet?

10 votes

How to use the 'modulus' operator?

9 votes
Accepted

Is there a difference between a geometric shape and a geometric figure?

9 votes

What is the general solution to $2 \cos^2 x-\cos x=0$?

9 votes

Applications of complex numbers to solve non-complex problems

9 votes
Accepted

If $a,b,c$ are positive integers, with $a^2+b^2-ab=c^2$ prove that $(a-b)(b-c)\le0$.

8 votes
Accepted

A formula for the sum of the triangular numbers?

8 votes
Accepted

Equation for Distance of the Straight line from the Origin.

7 votes
Accepted

Permutations with men and women alternating

7 votes
Accepted

How can we factorize $a{b^2} + {a^2}b + {a^2}c + a{c^2} + {b^2}c + b{c^2} + 2abc$?

7 votes
Accepted

For integer $n>3$, prove that $n^2+(n+1)^2\ne (n+2)^2$

7 votes
Accepted

To Show that $6$ divides $n$ if $6$ $|$ $(p_1 ^2 + p_2 ^2 + p_3 ^2 ......... p_n ^2)$ where $p_i$ is a prime$

6 votes
Accepted

A Very interesting door problem

6 votes
Accepted

Prove that a two digit number is divisible by the sum of its digits if it is divisible by $9$.

6 votes

Power tower of $10$

5 votes

Prime divisors of $60!$

5 votes

What does a dot in a circle mean?

5 votes
Accepted

If the number $a$ is equal to sum of square of two different numbers then $2a$ is also sum of square of two numbers.

1
2 3 4 5
10