tìm một số tự nhiên có bốn chữ số ít hơn so với 2015. Nếu xóa chữ số hàng nghìn thì số đó sẽ giảm 9 lần.
Từ đó ta biết số đó là 1125.
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Câu 1 :Each of cars can take 8 people. How many cars needed to take 124 people?
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Câu 5...
Đọc tiếp
Câu 1 :Each of cars can take 8 people. How many cars needed to take 124 people?
Câu 2 : How many integer numbers between 200 and 300 are there for which the hundreds digit equals the sum of the other two digits?
Câu 3 : The average of five numbers is 20. The average of the five number is 18 when one of the numbers is chaned to 4. What is the orginal value of the changed number?
Câu 4 :A book has 250 pages starting at number 1. How many digits are there in the page numbers of the book?
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how many natural numbers having three digits such that the tens digit squared equals the product of other digits and the difference between that number and its reversed other is 495?
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.
Câu 1:
. How many elements of the set A are divisible by 9?
Answer: elements
Câu 2:
Find the remainder of when it is divided by 3.
Answer: The remainder is
Câu 3:
Find the remainder of 9287 when it is divided by 3.
Answer: The remainder is
Câu 4:
Given that is divisible by 9. What is the value of ?
Answer:
Câu 5:
Given that is a composite number. How many values of are possible?
Answer: There are values.
Câu 6:
Given that 511 is the sum of two prime numbers...
Đọc tiếp
Câu 1:
. How many elements of the set A are divisible by 9?
Answer: elements Câu 2:
Find the remainder of
when it is divided by 3.
Answer: The remainder is Câu 3:
Find the remainder of 9287 when it is divided by 3.
Answer: The remainder is Câu 4:
Given that
is divisible by 9. What is the value of 
?
Answer:
Câu 5:
Given that
is a composite number. How many values of are possible?
Answer: There are values. Câu 6:
Given that 511 is the sum of two prime numbers and 
, $)
. What is the value of ?
Answer:
Câu 7:
Given that 511 is the sum of two prime numbers and $)
. What is the value of ?
Answer:
Câu 8:
Given that
is a prime number. How many values of are possible?
Answer: There are values. Câu 9:
Find the greatest 2-digit number that has 12 divisors.
Answer: It is Câu 10:
Given that
. How many divisors does the number A have?
Answer: The number A has divisors.
Answer: elements Câu 2:
Find the remainder of
Answer: The remainder is Câu 3:
Find the remainder of 9287 when it is divided by 3.
Answer: The remainder is Câu 4:
Given that
Answer:
Given that
Answer: There are values. Câu 6:
Given that 511 is the sum of two prime numbers
Answer:
Given that 511 is the sum of two prime numbers
Answer:
Given that
Answer: There are values. Câu 9:
Find the greatest 2-digit number that has 12 divisors.
Answer: It is Câu 10:
Given that
Answer: The number A has divisors.