The sum of 2018 and a 3-digit number is a square number. Find the smallest possible value of the 3- digit numbers

in a 4-digit number, the ones digit is the possible largest number, the hundreds digit is the smallest odd number and the tens digit is 1 more than the hundreds digit. The thousands digit is the sum of the hundreds and the tens digit. Find the number

In a 4-digit number, the ones digit is the possible biggest number, the hundreds digit is the smallest odd number and the tens digit is 1 more than the hundreds digit.  The thousands digit is the sum of the hundreds and tens digit . Find the number. nhanh lên nhé

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In a 4-digit number, the ones digit is the possible largest number, the hundreds digit is the smallest odd number and the tens digit is 1 more than the hundreds digit. The thousands digit is the sum of the hundreds and the tens digit. Find the number.
Answer: The number is 

Find the sum of the greatest 3-digit number and the smallest 2-digit number.
Answer: The sum 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 

a) find the next two term in the sequence: 1; 4; 9; 16; 25;....;.....;
Answer: 
b) find the smallest two-digit number whose number is 7 times the sum of its digits? 
Answer:

The difference of a 3 digit number and the smallest 3  digit number is just before of the greatest 2 even digit number . The 3 digit number is ......

The smallest number such that the product of all it's digit  is 20 is .............