Mathway | Popular Problems

Popular Problems

Rank	Topic	Problem	Formatted Problem
1	Find the Number of Possibilities	7 choose 3	${}_{7}C_{3}$ ${}_{7}C_{3}$
2	Find the Number of Possibilities	8 choose 3	${}_{8}C_{3}$ ${}_{8}C_{3}$
3	Find the Number of Possibilities	5 choose 2	${}_{5}C_{2}$ ${}_{5}C_{2}$
4	Find the Number of Possibilities	4 choose 2	${}_{4}C_{2}$ ${}_{4}C_{2}$
5	Find the Number of Possibilities	8 choose 4	${}_{8}C_{4}$ ${}_{8}C_{4}$
6	Find the Number of Possibilities	10 choose 3	${}_{10}C_{3}$ ${}_{10}C_{3}$
7	Find the Number of Possibilities	7 choose 4	${}_{7}C_{4}$ ${}_{7}C_{4}$
8	Find the Number of Possibilities	6 choose 3	${}_{6}C_{3}$ ${}_{6}C_{3}$
9	Find the Number of Possibilities	9 choose 3	${}_{9}C_{3}$ ${}_{9}C_{3}$
10	Find the Number of Possibilities	3 choose 2	${}_{3}C_{2}$ ${}_{3}C_{2}$
11	Find the Number of Possibilities	6 choose 4	${}_{6}C_{4}$ ${}_{6}C_{4}$
12	Find the Number of Possibilities	5 choose 4	${}_{5}C_{4}$ ${}_{5}C_{4}$
13	Find the Number of Possibilities	7 permute 3	${}_{7}P_{3}$ ${}_{7}P_{3}$
14	Find the Number of Possibilities	7 choose 2	${}_{7}C_{2}$ ${}_{7}C_{2}$
15	Find the Number of Possibilities	10 choose 5	${}_{10}C_{5}$ ${}_{10}C_{5}$
16	Find the Number of Possibilities	10 choose 6	${}_{10}C_{6}$ ${}_{10}C_{6}$
17	Find the Number of Possibilities	13 choose 5	${}_{13}C_{5}$ ${}_{13}C_{5}$
18	Find the Number of Possibilities	3 choose 3	${}_{3}C_{3}$ ${}_{3}C_{3}$
19	Find the Number of Possibilities	4 choose 1	${}_{4}C_{1}$ ${}_{4}C_{1}$
20	Find the Number of Possibilities	4 choose 4	${}_{4}C_{4}$ ${}_{4}C_{4}$
21	Find the Number of Possibilities	5 choose 1	${}_{5}C_{1}$ ${}_{5}C_{1}$
22	Find the Number of Possibilities	6 permute 3	${}_{6}P_{3}$ ${}_{6}P_{3}$
23	Find the Number of Possibilities	8 choose 5	${}_{8}C_{5}$ ${}_{8}C_{5}$
24	Find the Number of Possibilities	9 permute 4	${}_{9}P_{4}$ ${}_{9}P_{4}$
25	Find the Number of Possibilities	13 choose 3	${}_{13}C_{3}$ ${}_{13}C_{3}$
26	Find the Number of Possibilities	12 choose 2	${}_{12}C_{2}$ ${}_{12}C_{2}$
27	Find the Number of Possibilities	12 choose 4	${}_{12}C_{4}$ ${}_{12}C_{4}$
28	Find the Number of Possibilities	12 choose 3	${}_{12}C_{3}$ ${}_{12}C_{3}$
29	Find the Number of Possibilities	9 choose 5	${}_{9}C_{5}$ ${}_{9}C_{5}$
30	Find the Number of Possibilities	9 choose 2	${}_{9}C_{2}$ ${}_{9}C_{2}$
31	Find the Number of Possibilities	7 choose 5	${}_{7}C_{5}$ ${}_{7}C_{5}$
32	Find the Number of Possibilities	6 permute 6	${}_{6}P_{6}$ ${}_{6}P_{6}$
33	Find the Number of Possibilities	8 permute 5	${}_{8}P_{5}$ ${}_{8}P_{5}$
34	Find the Number of Possibilities	8 permute 3	${}_{8}P_{3}$ ${}_{8}P_{3}$
35	Find the Number of Possibilities	7 permute 5	${}_{7}P_{5}$ ${}_{7}P_{5}$
36	Find the Number of Possibilities	52 choose 5	${}_{52}C_{5}$ ${}_{52}C_{5}$
37	Find the Number of Possibilities	5 permute 3	${}_{5}P_{3}$ ${}_{5}P_{3}$
38	Find the Number of Possibilities	12 choose 5	${}_{12}C_{5}$ ${}_{12}C_{5}$
39	Find the Number of Possibilities	3 choose 1	${}_{3}C_{1}$ ${}_{3}C_{1}$
40	Find the Number of Possibilities	11 choose 5	${}_{11}C_{5}$ ${}_{11}C_{5}$
41	Find the Number of Possibilities	10 choose 2	${}_{10}C_{2}$ ${}_{10}C_{2}$
42	Find the Number of Possibilities	15 choose 3	${}_{15}C_{3}$ ${}_{15}C_{3}$
43	Find the Number of Possibilities	52 choose 4	${}_{52}C_{4}$ ${}_{52}C_{4}$
44	Find the Number of Possibilities	9 choose 4	${}_{9}C_{4}$ ${}_{9}C_{4}$
45	Find the Number of Possibilities	9 permute 3	${}_{9}P_{3}$ ${}_{9}P_{3}$
46	Find the Number of Possibilities	7 permute 4	${}_{7}P_{4}$ ${}_{7}P_{4}$
47	Find the Number of Possibilities	7 permute 2	${}_{7}P_{2}$ ${}_{7}P_{2}$
48	Find the Number of Possibilities	11 choose 4	${}_{11}C_{4}$ ${}_{11}C_{4}$
49	Find the Number of Possibilities	11 choose 2	${}_{11}C_{2}$ ${}_{11}C_{2}$
50	Find the Number of Possibilities	11 choose 3	${}_{11}C_{3}$ ${}_{11}C_{3}$
51	Find the Number of Possibilities	10 permute 5	${}_{10}P_{5}$ ${}_{10}P_{5}$
52	Find the Number of Possibilities	5 choose 5	${}_{5}C_{5}$ ${}_{5}C_{5}$
53	Find the Number of Possibilities	6 choose 1	${}_{6}C_{1}$ ${}_{6}C_{1}$
54	Find the Number of Possibilities	8 permute 4	${}_{8}P_{4}$ ${}_{8}P_{4}$
55	Find the Number of Possibilities	8 choose 6	${}_{8}C_{6}$ ${}_{8}C_{6}$
56	Find the Number of Possibilities	13 choose 4	${}_{13}C_{4}$ ${}_{13}C_{4}$
57	Evaluate	e	$e$ $e$
58	Find Any Equation Perpendicular to the Line	-7x-5y=7	$- 7 x - 5 y = 7$ $- 7 x - 5 y = 7$
59	Find the Number of Possibilities	13 choose 2	${}_{13}C_{2}$ ${}_{13}C_{2}$
60	Find the Number of Possibilities	10 permute 2	${}_{10}P_{2}$ ${}_{10}P_{2}$
61	Find the Number of Possibilities	10 permute 3	${}_{10}P_{3}$ ${}_{10}P_{3}$
62	Find the Number of Possibilities	10 choose 7	${}_{10}C_{7}$ ${}_{10}C_{7}$
63	Find the Number of Possibilities	20 choose 4	${}_{20}C_{4}$ ${}_{20}C_{4}$
64	Find the Number of Possibilities	6 permute 4	${}_{6}P_{4}$ ${}_{6}P_{4}$
65	Find the Number of Possibilities	5 permute 4	${}_{5}P_{4}$ ${}_{5}P_{4}$
66	Find the Number of Possibilities	6 choose 5	${}_{6}C_{5}$ ${}_{6}C_{5}$
67	Find the Number of Possibilities	52 choose 3	${}_{52}C_{3}$ ${}_{52}C_{3}$
68	Find the Number of Possibilities	4 choose 0	${}_{4}C_{0}$ ${}_{4}C_{0}$
69	Find the Number of Possibilities	9 permute 7	${}_{9}P_{7}$ ${}_{9}P_{7}$
70	Find the Number of Possibilities	6 choose 2	${}_{6}C_{2}$ ${}_{6}C_{2}$
71	Find the Number of Possibilities	5 permute 5	${}_{5}P_{5}$ ${}_{5}P_{5}$
72	Find the Number of Possibilities	5 permute 2	${}_{5}P_{2}$ ${}_{5}P_{2}$
73	Find the Number of Possibilities	6 choose 6	${}_{6}C_{6}$ ${}_{6}C_{6}$
74	Find the Number of Possibilities	7 choose 6	${}_{7}C_{6}$ ${}_{7}C_{6}$
75	Find the Number of Possibilities	8 permute 6	${}_{8}P_{6}$ ${}_{8}P_{6}$
76	Find the Number of Possibilities	7 permute 7	${}_{7}P_{7}$ ${}_{7}P_{7}$
77	Find the Number of Possibilities	9 permute 5	${}_{9}P_{5}$ ${}_{9}P_{5}$
78	Find the Number of Possibilities	2 permute 2	${}_{2}P_{2}$ ${}_{2}P_{2}$
79	Find the Number of Possibilities	10 choose 8	${}_{10}C_{8}$ ${}_{10}C_{8}$
80	Find the Number of Possibilities	12 choose 7	${}_{12}C_{7}$ ${}_{12}C_{7}$
81	Find the Number of Possibilities	15 choose 5	${}_{15}C_{5}$ ${}_{15}C_{5}$
82	Find the Inverse	[[1,0,1],[2,-2,-1],[3,0,0]]	$[\begin{array}{c} 1 & 0 & 1 \\ 2 & - 2 & - 1 \\ 3 & 0 & 0 \end{array}]$ $[\begin{array}{c} 1 & 0 & 1 \\ 2 & - 2 & - 1 \\ 3 & 0 & 0 \end{array}]$
83	Find the Range	1/4x-7	$\frac{1}{4} x - 7$ $\frac{1}{4} x - 7$
84	Find the Number of Possibilities	10 permute 7	${}_{10}P_{7}$ ${}_{10}P_{7}$
85	Find the Number of Possibilities	12 choose 6	${}_{12}C_{6}$ ${}_{12}C_{6}$
86	Find the Number of Possibilities	2 choose 1	${}_{2}C_{1}$ ${}_{2}C_{1}$
87	Find the Number of Possibilities	30 choose 3	${}_{30}C_{3}$ ${}_{30}C_{3}$
88	Find the Number of Possibilities	9 choose 6	${}_{9}C_{6}$ ${}_{9}C_{6}$
89	Find the Number of Possibilities	8 permute 2	${}_{8}P_{2}$ ${}_{8}P_{2}$
90	Find the Number of Possibilities	7 choose 1	${}_{7}C_{1}$ ${}_{7}C_{1}$
91	Find the Number of Possibilities	6 permute 2	${}_{6}P_{2}$ ${}_{6}P_{2}$
92	Find the Number of Possibilities	4 permute 2	${}_{4}P_{2}$ ${}_{4}P_{2}$
93	Find the Number of Possibilities	4 permute 3	${}_{4}P_{3}$ ${}_{4}P_{3}$
94	Find the Number of Possibilities	3 permute 3	${}_{3}P_{3}$ ${}_{3}P_{3}$
95	Find the Number of Possibilities	46 choose 6	${}_{46}C_{6}$ ${}_{46}C_{6}$
96	Find the Number of Possibilities	5 permute 1	${}_{5}P_{1}$ ${}_{5}P_{1}$
97	Find the Number of Possibilities	52 choose 7	${}_{52}C_{7}$ ${}_{52}C_{7}$
98	Find the Number of Possibilities	52 permute 5	${}_{52}P_{5}$ ${}_{52}P_{5}$
99	Find the Number of Possibilities	9 choose 1	${}_{9}C_{1}$ ${}_{9}C_{1}$
100	Find the Number of Possibilities	9 permute 6	${}_{9}P_{6}$ ${}_{9}P_{6}$