38965

We got 10 and 43 as the cubes directly underneath cube number one by:
• Counting all the cubes on each layer. Which led us to a pattern of 1,4,9,16,25 ect.
• Imagining it clearly in our heads
• Counting each cube in our heads as we went down
• We wrote the number of each layer like this and put a tick next to the ones we knew it would be (the third and fifth layers)

For the cubes directly beneath 4 we got 24 and 67 and directly beneath 8 we got 39 using the same strategies as before.