(Maths Olympiad 《Digits, Numbers and Multiples》 Pr& Question #) What is the sum of the smallest and the greatest -digit numbers that can be formed from digits , , , and ? 相关知识点: 试题来源: 解析 . smallest -digit number: greatest -digit number: The sum is .反馈 收藏 ...
【题目】(Maths Olympiad 《Problems from Page Numbers》 Pr4&5 Question #19)What is the sum of the first 100 digits in 1 23456789101112131415..? 答案 【解析】365.相关推荐 1【题目】(Maths Olympiad 《Problems from Page Numbers》 Pr4&5 Question #19)What is the sum of the first 100 digits...
What is the sum of all the digits of the page numbers of a 60-page book? 相关知识点: 试题来源: 解析 426. Pages 1 to 9 : 1+2+3+⋯ +9=45, Pages 10 to 19 : 45+1* 10=55, Pages 20 to 29 : 45+2* 10=65, \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ ...
(Maths Olympiad 《Digits, Numbers and Multiples》 Pr2&3 Question #10)What is the sum of the smallest and the greatest 4-digit numbers that can be formed from digits 3, 5, 8, and 0? 答案 11588.相关推荐 1(Maths Olympiad 《Digits, Numbers and Multiples》 Pr2&3 Question #10)What is...
The ones digit of is the same as the ones digit of . For , observe that the ones digits of the terms follow a pattern which repeats every terms. The pattern is , , , , . Thus, the ones digit for is the term of the pattern, which is . Therefore, the ones digit of is .反馈...
(Maths Olympiad Competition Manual Book2《One Digit》 Pr3&4 Question #28) What is the ones digit of 12+32+52+72+92+…+892?相关知识点: 试题来源: 解析 5. Identify a pattern for the ones digits. Terms 12 32 52 72 92 Ones digit 1 9 5 9 1 We observe that the ones digits of ...
(Maths Olympiad Competition Manual Book2 《One Digit》 Pr3&4 Question #2)What is the unit digit of 2+4+6+⋯+40? 相关知识点: 试题来源: 解析 O.First, identify a pattern for this series by listing down a few consecutive terms as follows:÷1∴AC=100000000∴100∴10x=1300∴10∴10=10...
What is the sum of the first 30 numbers in the series below? 1, 2, 3, 4, 5, 2, 3, 4, 5, 6, 3, 4, 5, 6, 7, 4, 5, 6, 7, 8, ⋯.相关知识点: 试题来源: 解析 165. 1+2+3+4+5=15, 2+3+4+5+6=20, 3+4+5+6+7=25, ~~~⋮ 6+7+8+9+10=40, 15+20+...
1(Maths Olympiad 《Value of Ones Digit》 Pr3&4 Question #8)What is the ones digit in each of the following?(1).(2).(3).(4). 2(Maths Olympiad 《Value of Ones Digit》 Pr3&4 Question #7)What is the ones digit in each of the following?(1).(2).(3).(4).反馈...
John C. Cairns is the supervisor of science and environmental education for the state of Delaware and GERARD J. PUTZ is the science consultant for the Macomb County Michigan Intermediate School District. They are the national co-directors of the Science Olympiad tournament. Some of the following ...