dREaM
Reputation
33,545
95/100 score
3 42 97
Impact
~340k people reached

 39 Research done by high-school students 30 Digit sequence that is not prime in any base 30 Find five consecutive odd integers such that their sum is $55$. 26 Subtraction when second number is bigger than first number 23 Why isnt there only one way of painting these horses?

### Reputation (33,545)

 +10 Show that $\mathbb{Q}(\sqrt{2})$ is the smallest subfield of $\mathbb{C}$ that contains $\sqrt{2}$ +35 Elementary Twin Prime Attempt. +5 If $|H|=112$ then $A_7\cap H \lhd H$? +15 Finding the adherent points of $A=\left\{\left(1/n,1/m\right)|n,m\in\mathbb{N}\right\}$

### Questions (253)

 34 difference between class, set , family and collection 33 What is category theory useful for? 32 Proof the Fibonacci numbers are not a polynomial. 28 What's a good place to learn Lie groups? 24 if there are 5 points on a sphere then 4 of them belong to a half-sphere.

### Tags (298)

 450 combinatorics × 382 152 discrete-mathematics × 120 347 elementary-number-theory × 171 145 graph-theory × 137 257 abstract-algebra × 160 128 algebra-precalculus × 61 214 group-theory × 145 95 contest-math × 75 174 number-theory × 89 94 probability × 97

### Accounts (14)

 Mathematics 33,545 rep 34297 Puzzling 654 rep 114 MathOverflow 421 rep 613 Stack Overflow 133 rep 9 English Language & Usage 126 rep 114