Question

If,
1, 5, 8 = 76
2, 7, 3 = 25
3, 4, 9 = 89
4, 5, 7 = 69
Then,
5, 3, 8 = ?

Answer 1

Hint:
In the given question, we have been asked to find the missing number and some series are given. In order to find the missing number, we need to observe the given series and understand the series very explicitly to find how to find the resultant number. In the given question, we have observed that from the three digits given, when we multiply last digit by 10 and subtract the difference of second and first digit we will get the required answer.

Complete step by step solution:
We have given that,
1, 5, 8 = 76
2, 7, 3 = 25
3, 4, 9 = 89
4, 5, 7 = 69
Here,
We can observe a pattern of the above series, i.e.
We have,
\[\Rightarrow 1,\text{ }5,\text{ }8\text{ }=\text{ }76\]
\[8\times 10-\left( 5-1 \right)=76\]
Then,
\[\Rightarrow 2,\text{ 7},\text{ 3 }=\text{ 25}\]
\[3\times 10-\left( 7-2 \right)=25\]
\[\Rightarrow 3,\text{ 4},\text{ 9 }=\text{ 89}\]
\[9\times 10-\left( 4-3 \right)=89\]
\[\Rightarrow 4,\text{ }5,\text{ 7 }=\text{ 69}\]
\[7\times 10-\left( 5-4 \right)=69\]
Here,
When we subtract the multiply the last digit by 10 to the subtraction of second digit to the first number, we will get the resultant number.
Therefore,
We have,
\[\Rightarrow 5,3,8=?\]
Then
\[8\times 10-\left( 3-5 \right)=80-\left( -2 \right)=82\]
Thus,
The resultant number is 82.
Hence it is the required answer.

Note:
Missing numbers are those numbers that have been missed from the given series or from a given pattern with similar differences among them. To find the missing number in a given series or given pattern, first we need to find the rule or a formula or a pattern from the given pattern, then we need to apply the same pattern or a formula we find the missing number.