| Easy | Medium | Hard | Extreme |
How many triangles in the figure above?
There are 15 triangles in total.
Size 1X1: 3 (BED, CFE and EJH)
Size 2X2: 4 (AFD, CKH, BJG and ENM)
Size 3X3: 4 (AKG, COM, BNL and ERQ)
Size 4X4: 3 (AOL, CSQ and BRP)
Size 5X5: 1 (ASP)
Size 1X1: 3 (BED, CFE and EJH)
Size 2X2: 4 (AFD, CKH, BJG and ENM)
Size 3X3: 4 (AKG, COM, BNL and ERQ)
Size 4X4: 3 (AOL, CSQ and BRP)
Size 5X5: 1 (ASP)
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