## We can observe that each row has 4 less blocks than the row below it.

To find out how many blocks are in the 7th row, we can use the following formula:

Number of blocks in the nth row = (First row - (n-1) * 4)

Using this formula, we can calculate the number of blocks in the 7th row:

Number of blocks in the 7th row = (40 - (7-1) * 4)

= (40 - 6 * 4)

= (40 - 24)

= 16

So, there are 16 blocks in the 7th row.

Now, to calculate the total number of blocks, we can sum up the blocks in each row. We know that each row has 4 less blocks than the row below it. So, we can use a sum of an arithmetic progression formula:

Sum of n terms = (n/2) * (First term + Last term)

Here, the first term is 40 and the last term is 4. So, we can calculate the total number of blocks as:

Total number of blocks = (7/2) * (40 + 4)

= (7/2) * 44

= 7 * 22

= 154

Therefore, there are 16 blocks in the 7th row, and the total number of blocks is 154.