ID NAME QUALITY USERS ACC % DIFFICULTY C I
42 Adding Reversed Numbers   70 46467
6
5
35302 Arithmetic or Geometric ?   0
25942 Ball sum   33 1293
12
12
30826 Bernoulli numbers   3 5
23
12
24998 PLAYING WITH BITS   29 554
13
13
17921 XOR   -15 4070
1
1
18294 Problem1   51
1
1
26314 Corn Headache   5 276
8
6
34620 Crying Series   1 36
1
6
27269 Cube Numbers   25 519
8
11
22403 Divisors of factorial   51 1217
15
14
27299 Find Log   1 77
1
1
25311 Candies   3 843
6
7
32445 COUNT JUMPS   1 62
5
1
25583 Easy Odd Sum   3 1026
2
2
35294 Tricky Means   9
31 Fast Multiplication   37 4119
14
13
16272 Nanoworld   1 34
17
17
25008 New Currency Shopping   1 7
34
17
35296 Prime or not Prime!   43
15708 Divisibility   10 4429
5
4
17104 Fun with Sequences (Act 3)   1 984
1
1
17126 Fun with Sequences (Act 4)   2 535
1
1
17481 Fun with Sequences (Act 5)   388
1
1
18011 Fun with Sequences (Act 6)   489
1
1
18012 Fun with Sequences (Act 7)   410
1
1
176 Sum of one-sequence   4 620
1
21
35303 Sum of GCD   0
22455 SUM OF PRODUCT   28 834
19
20
35293 Sums to calculate   39
35297 Trial Division   9
235 Very Fast Multiplication   16 791
28
22

#simple-math

The problem involves but simple mathematical concepts like arithmetic operations

http://www.basic-mathematics.com