Gamamal
Reputation
29,357
366/400 score
3 38 88
Impact
~297k people reached

 37 Research done by high-school students 30 Find five consecutive odd integers such that their sum is $55$. 29 Digit sequence that is not prime in any base 25 Subtraction when second number is bigger than first number 19 How can I prove the last digit of $(2^{121985292}-1)$ is $5$

### Reputation (29,357)

 +15 Do I or don't I, have to verify the existence of the identity in a subgroup? +10 Proof that if a simple Graph contains at most two nodes with odd degree then it has a Euler walk +10 prove that this number contains two equal digits +10 Is there a connection between lattices in the sense of orders and lattices in the sense of groups?

### Questions (233)

 33 difference between class, set , family and collection 32 Proof the Fibonacci numbers are not a polynomial. 29 What is category theory useful for? 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 (281)

 366 combinatorics × 351 137 discrete-mathematics × 116 281 elementary-number-theory × 148 133 graph-theory × 129 225 abstract-algebra × 144 114 algebra-precalculus × 55 174 group-theory × 127 81 probability × 86 148 number-theory × 75 81 arithmetic × 20

### Accounts (14)

 Mathematics 29,357 rep 33888 Puzzling 492 rep 111 MathOverflow 411 rep 612 Stack Overflow 128 rep 8 English Language & Usage 126 rep 114