Two puzzles a day.
Zero boredom.

The third board gives 2 blue + 2 green = 14. Combining the other two boards gives red = 10, blue = 5, green = 2. The last board has 2 red, 2 blue and 3 green: 20 + 10 + 6 = 36.

Square each half and add: 3² + 4² = 25 and 5² + 6² = 61. So 2² + 8² = 4 + 64 = 68.

The time is in the gaps, not the strikes. 6 strikes have 5 gaps, so each gap is 1 second. 12 strikes have 11 gaps: 11 seconds.

They're the first letters of One, Two, Three, Four, Five, Six, Seven. Next comes Eight.

The orchard is 8 × 6 = 48 trees. The inner block is 6 × 4 = 24, so the outer ring is also 24. 24 out of 48 = ½.

Subtract the squares: 5² − 3² = 16 and 7² − 2² = 45. So 6² − 4² = 36 − 16 = 20.

Each clock is worth the hour it shows: 3 + 3 + 3 = 9, 4 + 4 = 8, 5 + 5 = 10. The last line is 3 + 4 × 5. Multiply first: 3 + 20 = 23.

9 small ones, 3 medium ones (each made of 4 small triangles), and 1 big one around the whole shape. 9 + 3 + 1 = 13.

7, 3 and 8 are out. From 780, 0 is in but not last; from 206, it isn't in the middle, so 0 is first. 206 has two right digits, so 2 is in and 6 is out. In 682 the correct, well-placed digit must be 2, so 2 is last. From 614, 4 is in but not last, so it's in the middle.

The pipes to cups 2 and 4 are blocked. Cup 1 overflows into cup 3, but cup 3's pipe comes out of its bottom, so it drains straight into cup 5 before it can fill.

Every side adds up to 11: 2 + 5 + 4 = 11 and 2 + 3 + 6 = 11. So 4 + ? + 6 = 11, which makes ? = 1.