If 5432*7 is divisible by 9 then the digit in place of * is
2 answers:
Divide as far out as possible ^ shown in picture
When you get to 5*, you have to assume that the * holds the place of a number that will make 5* indivisible by 9 because 7 is indivisible by 9.
The only case when a number with the second digit being 7 is divisible by 9 is when it is a 2, so it can be assumed that the number remaining will look like 5* - a given number must be 2....
The next step is to look at the multiplicative possible answers of the 9s table - 9x6 for example is 54... the only number within those restrictions that is in the 50s and could possibly give an answer like 2... other numbers will result in an answer that is too big.
5* - 54 = 2... so
* will hold the digit 6
6 is the answer
You might be interested in
Answer:
4,5,27
Problem:
Boris chose three different numbers.
The sum of the three numbers is 36.
One of the numbers is a perfect cube.
The other two numbers are factors of 20.
Step-by-step explanation:
Let's pretend those numbers are:
.
We are given the sum is 36: .
One of our numbers is a perfect cube. where
is an integer.
The other two numbers are factors of 20. and
where
.
From here I would just try to find numbers that satisfy the conditions using trial and error.
So I have found a triple that works:
The numbers in ascending order is: