thirteen - 1,1,2,3,5,8,___ 21, acute - a type of angle, radius - half of a diameter is..., volume - length*width*height is a formula of , circumference - perimeter of a circle , fifteen - 4*2+7=, seven - I am an odd number. Take away one letter and I become even. What number am I?, twelve - squareroot of 144, numerator - top number of a fraction, twenty-five - what is five squared?,

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