# How to Use Calculator Effectively in CA CMA CS Exams – Exam Tips

Know **How to Use Calculator Effectively in CA CMA CS Exams.** In CA exams, Students are allowed to use only a basic calculator and not a scientific one. There are certain problems which you will find difficult to solve on calculator. So, we are providing some tricks for use of calculator which will definitely help in your exams. All you have to do simply follow the things that we are mentioned in this article. Preparing for exams is not only study related, you also have to know some tricks to write exam in an effective manner. We are here providing some typical **Calculator Tricks for CA, CMA & CS Students. **Here we are providing tips for** How to Use Calculator Effectively in CA CMA CS Exams.**

## How to Use Calculator Effectively in CA CMA CS Exams

First, I am going to tell you how to calculate any root, and not just a square root, on a basic calculator.**Step 1**Take any number say 1234**Step 2**Press ‘ROOT’ button on calculator 12 (twelve) times.**Step 3**Deduct 1 from the resulting figure. (Press – button and then press 1)**Step 4**Divide the resulting figure by the root you want to calculate.For eg. If you want to calculate cube root, divide it by 3. If you want to calculate 6th root, then divide it by 6 and likewise.**Step 4**Add back 1 you deducted earlier in Step 3 (Press + button and then press 1)**Step 5**Now you are at final step. You have to do contrary of Step 1.Press ‘x’ (MULTIPLY) and then ‘=’ (EQUAL) in combination, twelve times.For further clarification, first press ‘x’ then ‘=’. Then again ‘x’ then ‘=’. Follow this combination of step twelve times. Count 1 when you press ‘=’ and stop when you count till 12.The resulting figure is your ANSWER.Now, If you are clear about calculating any root on a basic calculator, you are ready to solve a problems with some ease.For eg:**Original cost-100000, Scrap value-5000, Useful life-6 yrs Rate-?****Formula given to find the rate: {1-[(scrapvalue/originalcost)^1/n]} how to get the rate ?**Formula for calculating depreciation rate is:Residual Value = Rs. 5000Cost of Fixed Asset = Rs. 100000N = 6So, we have to calculate 6th root of 5000/100000 i.e. 0.05**Step 1**Press ROOT button twelve times.Resulting figure: 0.99926888743**Step 2**Deduct 1 from Resulting figure in Step 1Resulting figure: -0.00073111257**Step 3**Divide Resuting figure in Step 2 by 6 (Six)Resulting figure: -0.00012185209**Step 4**Add 1 to resulting figure in Step 3Resuting figure: 0.99987814791**Step 5**Now, press ‘x’ and then ‘=’ in combination, 12 (Twelve) timesResulting Figure: 0.6070545673**Step 6**Now as per formula of calculating depreciation rateDeduct resulting figure in Step 5 from 1 (One){You may put resulting figure in Step 5 in ‘M-‘ and Then, press 1 and put it in ‘M+’. Then press ‘MR’ button. You will get answer by this.)ANSWER: 0.3929454327 OR 39.30% approxHope you like this article on trick for calculating any ROOT on a basic calculator.You might be finding it difficult to memorize at once. But, when you will practice it 2-3 times, you will get used to it and it shall come easy to you.Hope this article will help you much for your exams preparation. If you like this article, then Share this article **“How to Use Calculator Effectively in CA CMA CS Exams – Exam Tips” **to your friends.