There is a line of numbers: 1,1,2,3,5,8,13,21,34,55. Starting from the third number, each number is the sum of the first two numbers, in the first 10 Practical problem (process): there is a line of numbers: 1,1,2,3,5,8,13,21,34,55. Starting from the third number, each number is the sum of the first two numbers. In the first 100 numbers, how many even numbers are there? If you have a formula, try to give it

There is a line of numbers: 1,1,2,3,5,8,13,21,34,55. Starting from the third number, each number is the sum of the first two numbers, in the first 10 Practical problem (process): there is a line of numbers: 1,1,2,3,5,8,13,21,34,55. Starting from the third number, each number is the sum of the first two numbers. In the first 100 numbers, how many even numbers are there? If you have a formula, try to give it

Obviously, the position of multiples of 3 is even, so there are 33 even numbers

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