Rambharat Singh
Creator & Founder — Monkza
Based in Agra, Uttar Pradesh, India
I build web tools. Monkza is where I put them.
So far that is more than a hundred of them, all made by one person. That person is me.
How I check my work
A tool is only as good as its worst answer. That is true of a calculator, and it will be true of whatever I build next.
So nothing here is published until it has been through a test suite. A few thousand cases, each one compared against a result worked out independently of the code. The run has to come back with no mismatches at all. Not a handful. None.
The cases are not the easy ones. Zeros, negatives, numbers large enough that the arithmetic starts losing digits, inputs that ought to be refused outright rather than answered — those are what catch a bug. An engine that handles the textbook example and falls over on a zero vector is not finished.
Easy to say. Tedious to hold to. On most of the tools here the checking took longer than the building did, and I think that is the right way round.
The article beneath each calculator gets the same attention. I try to show the working rather than the answer, name the mistake people actually make with that particular topic, and say so plainly when a method everyone repeats is more trouble than it is worth.
Background
I work from Agra now, but Monkza starts in Fatehabad.
I left school in 2015, from Janta Inter College in Fatehabad, and read Mathematics at Agra College, founded in 1823 and one of the oldest institutions of higher education in north India.
Money was why I started blogging. SEO followed, because SEO paid, and inside a year I was doing that work for other people's websites too.
In 2017, still in my final year, I started teaching at Usha Devi Convent School in Fatehabad. Maths mostly. Other subjects when they were short-handed.
I stayed seven years.
Teaching a nine-year-old is the quickest way to find out whether you understand something yourself. If the explanation has a hole in it, they find it before you have finished the sentence. You cannot bluff a child through a proof.
Code came in 2019. At home, alone, no course and nobody to ask. For the next five years there were two working days inside each day — the school until afternoon, writing and code at night.
Then I started building tools of my own, and that became Monkza.
Calculators came first because maths was the thing I knew best and the thing I had spent seven years explaining. They will not be the last of it. There is more on the way, and some of it will have nothing to do with maths.
Education
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Agra College, Agra
B.Sc. in Mathematics · 2015–2018
Affiliated to Dr. Bhimrao Ambedkar University, Agra - Janta Inter College, Fatehabad, Agra Intermediate · 2014–2015
Expertise
Building
- Web tools
- Educational software
- Front-end development
- Interface design
- Technical writing
- SEO
Subjects
- Algebra
- Coordinate geometry
- Conic sections
- Matrices and linear systems
- Sequences and series
- Vectors
- Complex numbers
What I have built
Everything I have made sits on this site, free, with nothing to sign up for. At the moment that is more than a hundred calculators covering school and undergraduate mathematics — algebra through to vectors and complex numbers.
Each one carries an article underneath it. The answer on its own teaches nobody anything; the working is the part worth reading.
Found a wrong answer? Write to me at info.monkza@gmail.com. I would rather hear it from you than leave it sitting there. Tell me which calculator, the values you put in, and the answer you expected — I will look the same day.
Profiles
If you want to follow what I am working on, or reach me somewhere other than email, these are the two places I use.