Ví dụ : Chữ o là số 5 chẳng hạn ( Chỉ mang tính chất minh họa )
one + one + one + one = four
=> 1 + 1 + 1 +1 = 4
four + one = five
=> 4 + 1 = 5
Ví dụ : Chữ o là số 5 chẳng hạn ( Chỉ mang tính chất minh họa )
one + one + one + one = four
=> 1 + 1 + 1 +1 = 4
four + one = five
=> 4 + 1 = 5
From 4 letters ab18 one can make all 18 numbers with 4 digits. (In a number, each digit is written only once.) The sum of all 18 possible numbers is 90216. Find a and b.
Edmond was one of 14 athletes in the track - and - field team. They are numbered from 1 to 14. The sum of the numbers of the other 13 is athletes 100.
What is Edmond's number?
Class 6A has 42 pupils. 30 of them joined the Swimming club and 25 of them joined the Gymastic club. All pupils must be a member of at least one club, find the number of pupils who joined both clubs.
Câu 9:
Among all natural number pairs satisfy , one pair has the greatest product. What is this product?
Your school is having a canned food drive for Harvesters. How many total cans would you have if you made a solid pyramid with cans on the first level, on the second level and continue the pattern all the way up to just one can on top?
Điền vào dấu * các chữ số thích hợp để:
b) 2*43*5 chia hết cho 1375
(3-5GP) Các bạn hãy tìm quy luật của dãy số sau và tìm các số (?):
1, 2, 4, 8, 16, 31, ?, ?, ?
Lưu ý: các bạn không được dùng Sơ đồ Hooc-ne để giải bài toán này. Bài toán có thể có nhiều hơn 1 lời giải.
The sum of four natural numbers is 1111. Find the largest possible values of highest common factor of these four numbers.
The sum of four natural numbers is 1111. Find the largeest possible values of highest common factor of these four numbers.