1. How many natural numbers less than 1000 are divisible by 2, but not divisible by 5?
1. The number of natural numbers less than 1000 that are divisible by 2 is 499.

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From this number, the number of those numbers that are divisible by both 2 and 5, i.e., by 10, should be subtracted. There are 99 such numbers.

Therefore, the number of natural numbers less than 1000 that are divisible by 2 but not

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