How To Beat A Calculator Fast

How To Beat A Calculator Fast


Being good at mathematics is something that can enable you to solve problems quicker than a calculator. This is not just a statement – it is a reality.

There are certain techniques you can learn which can literally make your brain work faster than a calculator!

By the time your friend can be tapping digits into the calculator, you would have already given the answer. These advanced techniques are the ones which I will list in the headings below. 


“Simply focus on the numbers.”

The basic technique behind calculating percentages faster than a calculator is to stop worrying about the decimals – simply focus on the numbers. As for decimals, all you need to do is to place the decimal two numbers to the left. The process can be understood using a very simple example. What is 20% of 70? Well, multiply 70 by 20 to get 1400, then move the decimal place two numbers to the left and you get your answer – 14. 

Square Root 

Sure, finding the square root of 2 is easy, but what about the square of 85? Well, you can certainly estimate it quickly and easily. First of all, search out the closest square. In the case of 85, the nearest square number is 81, so the closest square is 9. Consider the next closest square, in our case it is 10. Therefore, the square root of 85 lies between 10 and 9. 

“One way of comparing jobs is to figure out the hourly rate of pay.”

Hourly Rate 

Sometimes you get two job offers at the same time. One way of comparing jobs is to figure out the hourly rate of pay. For example, if you have similar working hours for both jobs, which is paying better – the one paying an hourly rate of $31 or the one paying an annual salary of $58,000? 

Well you can calculate the hourly rate much faster than a calculator. First of all, simply try to figure out the hourly rate of the annual salary. This can be done by getting rid of the 3 zeroes and dividing the digit with 2. In our case 58 / 2 = 29; this means that the $31 per hour job is a much better option for you. You do not need to purchase a financial calculator for this! 

Multiplication By 4 

If you want to multiply any number by 4 in the blink of an eye then simply double it twice. For example, if the number is 1223, double it once to get 2446, then double it again to get 4892. 1223 x 4 = 4892. 


“Fractions can be estimated easily by you utilizing simple benchmarks.”

Fractions can be estimated easily by you utilizing simple benchmarks. For example, 30/50 is very near to 30/60. Since the dominator of 30/60 (½) is greater than 30/50 this means that 30/50 should be larger than 0.50. 


There are several math tricks that can be utilized by you.

The point here is that you should never underestimate the power of your brain. As per the famous quote of Michio Kaku, “The human brain has 100 billion neurons, each neuron connected to 10 thousand other neurons.Sitting on your shoulders is the most complicated object in the known universe.” 

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