Diamond Puzzle Factoring

Fill in the missing numbers.

• top: 20, bottom:9
• top: 1, bottom:9
• top: -1, bottom:20
• top: 11, bottom:9

Fill in the missing numbers. 

• top:18, bottom:9
• top:3, bottom:9
• top:9, bottom:9
• top:3, bottom:18

Fill in the missing numbers.

• top:-4, bottom:3
• top:3, bottom:5
• top:4, bottom:3
• top:16, bottom:16

Fill in the missing numbers.

• left: -2, bottom:-15
• left:2, bottom:15
• left:15, bottom:15
• left:2, bottom:13

Fill in the missing numbers.

• Bottom: 0 Left: 0
• Left: 0, Bottom: 8
• Left: 8, Bottom: 16
• Left: -8, Bottom: 0

Fill in the missing numbers. (order doesn't matter)

• 1,3 
• -1, -3
• 3, 12
• -1, 12

Fill in the missing numbers. (order doesn't matter)

• -3, -1
• 1,3
• 0, 1
• 1,-12

Fill in the missing numbers. (order doesn't matter)

• 3,4
• 2,6
• 12,8
• -6,-2

Fill in the missing numbers. (order doesn't matter)

• 4,9
• -4,-9
• 3,23
• 13,13

Fill in the missing numbers. (order doesn't matter)

• 2,7
• -2,7
• -7,-2
• 2,5