Name: Math Olympiad for Elementary | 2019 | Division E | Contest 3 | MOEMS | 3B
Uploaded: 2021-12-04T13:46:44+00:00
Duration: 5 min
Description: Problem: In the list of numbers 3, 8, 13, 18, ...., 98, there are 20 numbers, and each number after the first is five more than the previous number. All of the numbers are added together to give a sum

3 years ago

Problem: In the list of numbers 3, 8, 13, 18, ...., 98, there are 20 numbers, and each number after the first is five more than the previous number. All of the numbers are added together to give a sum. What is the units digit of the sum?

Key: Finding a pattern, Abstract thinking

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