Answer: There are 41 blocks in all.
Step-by-step explanation:
Given: Number of red blocks = 4
Number of Yellow blocks = red blocks + 15
= 4+15= 19
Number of blue blocks = red blocks +14 = 4+14=18
Total blocks = red blocks + yellow blocks + blue blocks
= 4+19+18 =41
Hence, there are 41 blocks in all.