225
Assuming they are 8 inch*16 inch blocks, 144 square feet = 144*12*12 square inches. So number of blocks required = 144*12*12/(8*16) = 162
49 plus ten percent for breakage. Get 54.
You need 8 cubic blocks of sides 0.5 inches to make a 1 inch block.
To cover the floor - 40. 24 inch by 15 inch = 2 feet by 1.25 feet. So, you will get five blocks the 24 inch way (10/2 = 5), and eight the 15 inch way 10/1.25 = 8). 5 x 8 = 40. Since you did not give a) the height of the room and b) the thickness of the blocks, we must assume you wanted only one layer on the floor.
4
12 x 12 blocks (assumed as 12 inch x 12 inch) That means the blocks are 1 square foot each Hence to cover 240 square feet area, you would need 240 blocks
More information is needed EG what type of 12 inch blocks there are many(see link below). Also what way up are you using these blocks. http://www.boralbestblock.com/product-lines/masonry/standard-block/12-inch-block
Assuming they are 8 inch*16 inch blocks, 144 square feet = 144*12*12 square inches. So number of blocks required = 144*12*12/(8*16) = 162
16 inch blocks have an area of 16 x 16 = 256 sqinches . You want to cover an area of 61 x 58 = 3538 sqinches. So you need at least 3538/256 = 13.8 blocks.
I think perhaps 2250 blocks .
Six and one-half blocks.
49 plus ten percent for breakage. Get 54.
64 of them.
8
You need 8 cubic blocks of sides 0.5 inches to make a 1 inch block.
50
1,000