Top 10 Calculator Tricks to Solve CA Foundation Maths Fast

In Paper 3 (Quantitative Aptitude) of the CA Foundation exam, you have 100 questions to solve in 120 minutes. Due to negative marking, speed and accuracy are crucial. Your calculator is your most powerful tool—if you know how to use it.

Here are the top 10 calculator hacks that toppers use to solve complex formulas without writing down mid-steps.

1. Exponent and Power Calculations ($x^n$) ⚡

To calculate $1.08^8$ quickly:

1. Type the base value: 1.08.
2. Press the multiplication key [×] twice.
3. Press the equals key [=] 7 times (i.e., $n-1$ times).
4. The screen will display 1.85093.

2. The Present Value of Annuity Shortcut (using GT) 🖐️

To find the present value of an ordinary annuity of ₹10,000 for 5 years at 10% interest rate:

1. Calculate the discount factor: Type 1 [÷] 1.10.
2. Press [=] 5 times (once for each year).
3. Press the GT (Grand Total) key. This sums up all 5 discount factors.
4. Multiply by the installment: Press [×] 10000 [=].
5. The answer 37907.86 is displayed immediately. No formulas needed!

3. Storing Mid-Steps in Memory (M+ / M- / MRC) 🧠

When solving equations like $rac{45}{12} + rac{98}{7}$:

1. Type 45 [÷] 12 [=] and press the [M+] key.
2. Type 98 [÷] 7 [=] and press the [M+] key.
3. Press MRC once to recall the grand total of both portions.