Математическая задачка на английском Find the sum of all two-digit natural numbers are divisible by 2 but not by 3

Предыдущий
вопрос Следующий
вопрос

To find the sum of all two-digit natural numbers that are divisible by 2 but not by 3, we need to first list out all the numbers that fit these criteria.

The two-digit numbers divisible by 2 but not by 3 are: 12, 14, 16, 18, 22, 24, 26, 28, 32, 34, 36, 38, 42, 44, 46, 48, 52, 54, 56, 58, 62, 64, 66, 68, 72, 74, 76, 78, 82, 84, 86, 88, 92, 94, 96, 98.

To find the sum, we add all these numbers together:
12 + 14 + 16 + 18 + 22 + 24 + 26 + 28 + 32 + 34 + 36 + 38 + 42 + 44 + 46 + 48 + 52 + 54 + 56 + 58 + 62 + 64 + 66 + 68 + 72 + 74 + 76 + 78 + 82 + 84 + 86 + 88 + 92 + 94 + 96 + 98 = 1804

Therefore, the sum of all two-digit natural numbers that are divisible by 2 but not by 3 is 1804.