thế này gì:các đơn vị chữ số của một số dương là 2. nếu chúng ta di chuyển nó đến đầu kia, chúng ta có được một số mới mà là hai lần số cũ. giá trị nhỏ nhất của các số cũ là gì?
the units digit of a positive number is 2. if we move it to the other end, we get a new number which is twice the old number. what is the smallest value of the old number?
the units digit of a positive number is 2. if we move it to the other rnd, we get a new number which is twice the old number. what is the smallest value of the old number?
Mary writes down a three-digit number. William copies her number twice in a row to
form a six-digit number. When William’s number is divided by the square of Mary’s
number, the answer is an integer. What is the value of this integer?
A natural number has six digits and the units digit is 4.If the units digit is moved to the first row then the number will be increasedby 4 times.The number is
A 4-digits number is divisble by all of the numbers from 1 to 10 ưithout any remainder .
find the smallest possible value of the 4 - digit number
Question 1:
The least common multiple of 330; 65; 15 is
Question 2:
Given seven numbers: 25; 17; 39; 43; 239; 1021; 1023.
The composite numbers are
(Write numbers in order from the least to the greatest and use ";")
Question 3:
The common factors of 18 and 27 are
(Write numbers in order from the least to the greatest and use ";")
Question 4:
Given the set of even numbers: {2; 4; 6; …; 100}.The number of elements is
Question 5:
Find four integer numbers a,b,c,d such that
a + b + c + d = 1
a + c + d = 2
a + b + d = 3
a + b + c = 4
Answer: (a;b;c;d)=()
Question 6:
Find a four-digit natural number that is less than 2015.If the thousands digit is erased,the number will be decreased by 9 times.
Answer:The number is
Question 7:
Calculate: 1×2+2×3+⋯+100×101=
Question 8:
The term of the expression A=1-7+13-19+25-31+⋯ is
Question 9:
Given the expression A= ...
Find the value of n such that 2A+3=
Answer: n=
Question 10:
A natural number has six digits and the units digit is 4.If the units digit is moved to the first row then the number will be increasedby 4 times.The number is
a polindrome number is a positive integer that is the same when read forwards or backwards. the numbers 303 and 6996 are examples of palindromes numbers to the numbers of 5-digit palindrome number is
When 117 is divided by a number m, we get a quotient of 6 and the remainder of 3. What is the number m?
A palindrome number is a positive integer that is the same when read forwards or backwards. The numbers 303 and 6996 are examples of palindromes. The ratio of the number of 4 - digit palindrome numbers to the number of 5 - digit palindrome numbers is …
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