Math Pyramid Brain Teaser

Answer or Solution :
The correct answer is 1260.

Number 12 is derived as 4x2+4,

first number 4 is derived 2x1+2,

second number 4 is derived as 1x3+1,

number 60 is derived as 12x4+12,

number 20 is derived as 4x4+4,

finally number 1260 is derived as 60x20+60 = 1260.

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