Rows of pins in tenpin bowling?

1. o o o o 2. o o o 3. o o 4. o There are 4. The first has one pin, the second 2, the third 3, and the fourth 4. 1+2+3+4 = 10.

Four ... the 7, 8, 9, and 10 pins.

Ten.

4 in back row. then 3 in next row 2 in the next and 1 in front Edit: assuming you are referring to the 10-pin bowling, there are four in the back row, not five, as was previously answered by...

In tenpin bowling from center of pin to center of pin, the distance must be 12 inches. This is to form an equilateral triangle on the pin deck. Each ray of the triage is 36 inches. Therefore the...