Since there is insufficient information in each individual question to solve them individually, the questions must be connected, implying that their solutions are also connected.
So, I took each known value and created a set of factors and LCMs:
10=2×5, 24=2×2×2×3, LCM=120
4=2×2, 20=2×2×5, LCM=20
15=3×5, 25=5×5, LCM=75
The set is: 2, 2, 2, 3, 5, 5, LCM=600.
Then, I divided the LCM for each question into the LCM for the set:
5,
30,
8,
to give me the missing values.
The questioner only asked for the answers, not the method.