Shortcut Formulas for Simple Interest.
Today we will solve some quantitive aptitude by using math tricks. As you have seen the question of the previous tutorial was straightforward because we were discussing the core concept and formula. But today, we are increasing a level to be ready for upcoming competitive exam's math
Simple Interest Solved Question and answer
Aptitude 1: Rupees 2000 became 3000 in 5 years, find the rate interest per annum?
Above aptitude is a very easy and basic conceptual problem which you have learned in your school life. Look at another example which is something advanced level and solution tricks are very easy. The shortcut formula has been given on the opening page of simple interest. However, look at the aptitude question and quick solution.
Aptitude 2: A businessman makes payment to the bank three times of his borrowed money at the rate of 8% simple interest. Now find the time of keeping money in his business?
Solution: This is also an important and easy aptitude like as the previous question. Just we have to replace the r% instead of time on the previous one. Look at below how we execute the answer?
Aptitude 3: on a certain sum, only interest comes 1/2 of principle in 5 years. Now find the rate of interest?
Solution:- like first aptitude question solution execute the r%. Firstly calculate the numerator, like 100(1 - 1/2) and then divide by the 5 years. Let's look at the below:-
{100(1-1/2)}={100* 1/2}=50/5=5 pa.
Hope you have enjoyed the Simple Interest Fact and shortcuts formula for the competitive Maths. If you need more Mensuration chapters then open the Mensuration Formulas. You will get all Mensuration Topic tutorial links on this page.
Above aptitude is a very easy and basic conceptual problem which you have learned in your school life. Look at another example which is something advanced level and solution tricks are very easy. The shortcut formula has been given on the opening page of simple interest. However, look at the aptitude question and quick solution.
- Rupees 3000 increase three times with the interest in 20 years, find the rate interest per annum?
- In the above image, we have shown a math trick and solved a problem. Here x is the times of increasing principle and T is the time in years. Like this kind of aptitude, we can solve without knowing the principle or without assuming the principle.
Aptitude 2: A businessman makes payment to the bank three times of his borrowed money at the rate of 8% simple interest. Now find the time of keeping money in his business?
Solution: This is also an important and easy aptitude like as the previous question. Just we have to replace the r% instead of time on the previous one. Look at below how we execute the answer?
Aptitude 3: on a certain sum, only interest comes 1/2 of principle in 5 years. Now find the rate of interest?
Solution:- like first aptitude question solution execute the r%. Firstly calculate the numerator, like 100(1 - 1/2) and then divide by the 5 years. Let's look at the below:-
{100(1-1/2)}={100* 1/2}=50/5=5 pa.
Hope you have enjoyed the Simple Interest Fact and shortcuts formula for the competitive Maths. If you need more Mensuration chapters then open the Mensuration Formulas. You will get all Mensuration Topic tutorial links on this page.
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