| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| extremely hard brain teasers | 1.22 | 0.2 | 3604 | 31 | 28 |
| extremely | 0.99 | 0.3 | 1853 | 18 | 9 |
| hard | 0.97 | 0.1 | 5332 | 16 | 4 |
| brain | 0.46 | 0.6 | 5188 | 63 | 5 |
| teasers | 1.25 | 0.9 | 6659 | 40 | 7 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| extremely hard brain teasers | 1.86 | 1 | 1489 | 41 |
| extremely hard brain teasers with answers | 0.05 | 1 | 6722 | 90 |
| hard adult brain teasers | 1.7 | 0.5 | 7869 | 41 |
| brain teasers for adults hard | 1.39 | 0.4 | 7263 | 41 |
| hard brain teasers with simple answers | 0.38 | 0.1 | 1000 | 34 |
| hard brain teasers with answers | 0.65 | 0.7 | 9975 | 96 |
| super hard brain teasers | 1.21 | 0.1 | 5689 | 30 |
| most difficult brain teasers | 0.27 | 1 | 2017 | 51 |
| hardest brain teasers for adults | 0.39 | 0.8 | 2738 | 90 |
| hard brain teasers for adults with answers | 1.29 | 0.3 | 8668 | 16 |
| hardest brain teasers with answers | 0.36 | 0.8 | 5550 | 24 |
| very difficult brain teasers for adults | 0.47 | 0.8 | 7593 | 67 |
| worlds hardest brain teasers | 0.19 | 0.9 | 6971 | 59 |
| difficult brain teasers with answers | 1.58 | 0.5 | 6013 | 54 |
| adult brain teasers difficult | 0.21 | 0.1 | 2898 | 66 |
| hardest brain teaser ever | 1.36 | 0.7 | 5310 | 48 |
