Compere the number P=888...888x333...333 and Q=444...444x666...667,where each has 2017 digits
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the sum of the digits of a certain two - digits number is 11. when you reverse its digits you decrease the number by 9
There're four black box and each box has the same number of marbles. Only one of the following statements is correct about the number of marbles in it.
- Five or Six
- Seven or Eight
- Six or Seven
- Seven or Five
How many marbles are there in each box?
Find all natural numbers having two digit , knowing that twice the units digit 1 more than the ten digit , and if we write that two digits in reverse order, we get a new number which is 27 less than the old one
Toán tiếng anh: A rectangle has length pcm and width qcm, where p and q are integer. If p and q satisfy the equation pq+q=13+q2 then the maximum possible area of the rectangle is.........
a rectangle has length p and breadth p where p,q are intergers . If p, q satisfy the equation pq+q=13+q^2. What is the maximun of the area of the rectangle?
Let N be the langest number ò region that can be formed by drawing 2016 straight lines on a plane. Find the sum ò all digits of N.
m and n are positive integers such that 10(m^2+1)=n^2+1\(\), where m^2+1 \(\) is a prime number. The number of pairs (m,n) is...
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The average of three numbers is 42. All three are whole positive number and are different from each other.
If the least number is 20, what could be the greatest possible number of the remaining two numbers?
Answer: ......
