Problem 2133. Reverse Calculator

Created by Vivek

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Use this reverse calculator and give correct output

Its simple, In my Reverse calculator if you press 0 it will be considered as 9. Likewise 1 will be 8, 2 will be 7, 3 will be 6,......., 9 will be 0.

Here you will get two numbers and an operator(+ - * /). From this calculate the output.

Example:

 Inputs:
numbers=[3 4], operator='+'

 Output:
Value=11 (Because 3 will be considered as 6, 4 will be considered as 5. So 6+5=11)

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Last Solution submitted on Dec 16, 2025

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2 Comments

Dyuman Joshi on 11 Dec 2020

There's no warning to not use feval or str2func but I still can't use it?
Can someone tell me why?

goc3 on 14 Dec 2020

I believe that those functions have been banned site-wide. This is one of the few problems where that universal ban is frustrating for those not seeking to hack...

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Problem 2133. Reverse Calculator

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Last 200 Solutions

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Problem 2133. Reverse Calculator

Solution Stats

Last 200 Solutions

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Solution Comments

Problem Recent Solvers200

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More from this Author3

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