# How you can get number 28 by using following numbers and operators.

97 views

How you can get number 28 by using following numbers and operators

Numbers: 1, 5, 7 and 8.
Operators: +, -, * and /
You can use ( ) brackets as well.

Rules:-

You can use each number only once.
You can not use 1 and 5 as 15.
You have to use all of the above number mentioned (1,5,7 and 8)

posted May 12, 2014

+1 vote

We can make 28 as follow as:

(7*5)-8+1 = 35-8+1

Hence It is 28

We can find 28 in this format :-

(5*7)+1-8 = 28

Similar Puzzles

By using all numbers, i.e. 123456789 and subtraction/addition, operators number 100 can be formed in many ways.
Example 98 + 7 + 6 - 5 - 4 - 3 + 2 - 1 = 100

But if we add a condition that use of the number 32 is the must. Then there are limited solutions.
One of such solution is: 9 - 8 + 76 + 54 - 32 + 1 = 100

Can you tell any other solution?

By using the numbers 8,5 1 and 1 exactly once and with the help of basic operation (+, -, /, *), Can you form an expression with a value of 10?

Note: Parentheses are allowed

``````            Number             Code