Question
B, C, D, E, F and G are 2-digit numbers. If B is 15, C is the fourth multiple of B, D is the seventh multiple of 10, E is the volume of a cube with length of 4 units, and G is the 2nd multiple of 12, F is the first 2-digit of the 4-digit number. What is F?


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B, C, D, E, F and G are 2-digit numbers. If B is 15, C is the fourth multiple of B, D is the seventh multiple of 10, E is the volume of a cube with length of 4 units, and G is the 2nd multiple of 12, F is the first 2-digit of the 4-digit number. What is F?