(Maths Olympiad Competition Manual Book3《Divisibility and Remainders》 Pr5&6 Question #18) Jeannie grouped some positive whole numbers in a table in a particular pattern as follows: C1 C2 C3 C4 C5 C6 1 2 3 9 8 7 6 5 4 10 11 12 18 17 16 15 14 13 19 20 21 27 26 25 24 ...
题目(Maths Olympiad Competition Manual Book3《Permutations and Combinations》 Pr5&6 Question #11) How many 2−digit numbers can be formed using the digits 1, 3, 5, 7 and 9 if each digit can only be used once in every number?
(Maths Olympiad Competition Manual Book2 《Factors and Multiples》 Pr3&4 Question #12) Find the smallest whole number such that the product of 675 and the number is a perfect square.相关知识点: 试题来源: 解析 3. 675=3×225 =3×3×75 =3×3×3×25 =3×3×3×5×5 In order to ...
(Maths Olympiad Competition Manual Book2《Number Summation》 Pr3&4 Question #34) Find the value of 30+29+28+⋯+11.相关知识点: 试题来源: 解析 410. Number of terms =30−11+1 =20 Number of pairs =20÷2 =10 Sum of each pair =30+11 =41 Therefore, the sum is 41×10=410....
题目(Maths Olympiad Competition Manual Book3《Making an Organised List》 Pr5&6 Question #6) A teacher wants to divide 8 pupils, A, B, C, D, E, F, G and H, into two groups of 4. It is given that pupils C and D cannot be in the same group and pupils E and F must be in ...
(Maths Olympiad 《Problems from Page Numbers》 Pr4&5 Question #8) A book has 145 pages. How many digits are there in the page numbers of the book? 相关知识点: 试题来源: 解析 327 page 1 to page 9 : 9 digits page 10 to page 99 : 90×2=180 digits page 100 to page 145 : 46...
结果1 题目【题目】 (Maths Olympiad Competition Manual Book3 Prob ability Pr5& 6 Question # 7) A fair coin is tossed 5 times. What is the probability of getting the outcome ' head' for all 5 tosses? 相关知识点: 试题来源: 解析
百度试题 结果1 题目(Maths Olympiad Competition Manual Book3《Permutations and Combinations》 Pr5&6 Question #8) There are 10 pupils in a hall. How many ways can a group of 4 pupils be formed? 相关知识点: 试题来源: 解析 210.
(Maths Olympiad 《Problems from Page Numbers》 Pr4&5 Question #6) A book has 145 pages. How many times does the digit '1' appear in the page numbers of the book?相关知识点: 试题来源: 解析 81. digit '1' in the ones place : 1, 11, 21, ⋯, 131, 141 = 15 times digit '1'...
(Maths Olympiad Competition Manual Book2《Number Summation》 Pr3&4 Question #23) Find the position of the last term of the following sequence. 8, 11, 14, ⋯, 110, 113相关知识点: 试题来源: 解析 36. First term: 8 Last term: 113 The difference between every two consecutive numbers is ...