## TNPSC Aptitude and Mental Ability Study Materials:

Aptitude and Mental Ability questions are more important for the TNPSC Group 2 Prelims Exam. You will get 25 marks from that Aptitude and Mental Ability portion. On this page, TNPSC Group 2, 2a, and Group 4 Aptitude and Mental Ability Books Study Materials questions with answers are uploaded. Go through TNPSC Aptitude Shortcuts & tricks in order to save your time in the prelims exam.

Students who are preparing for the Group exam concentrate more on the maths part. you will easily score more marks in the Mental Ability part. For students’ benefit, we upload aptitude and mental ability English and Tamil questions and answers in PDF for download.  TNPSC aspirants can download and use it for the group prelims exam. kindly download TNPSC Maths PDF given below:

### TNPSC Maths – Percentage:

• The percentage is a fraction with a denominator of a hundred.
• Percent means per hundred or out of a hundred. It is denoted by the symbol %. x% denotes the fraction x/100. Percentages are useful in comparing quantities easily.
• To convert a fraction as a percentage, multiply the numerator and denominator of the fraction by 100.
• To convert a percentage as a fraction, write it as a fraction with a denominator of 100.
• To convert decimals into percentages, multiply the given decimals by 100%.

Cost Price (C.P)
The amount for which an article is bought is called its Cost Price (C.P)

Selling Price (S.P)
The amount for which an article is sold is called its Selling Price (S.P)

Profit or Gain
When the S.P is more than the C.P, then there is a profit or gain.
Therefore, Gain/Profit =S.P – C.P

Loss:
When the S.P is less than the C.P, then there is a loss.
Therefore, Loss = C.P – S.P
It is to be noted that the profit or loss is always calculated on the cost price.

Discount:
In order to increase the sale and also to clear the old stock during the month of Aadi and festival seasons, shopkeepers offer a certain percentage of rebates on the marked price of the articles. This rebate is known as a discount.

Marked price:
In big shops and departmental stores, we see that every product is tagged with a card with a price written on it. The price marked on it is called the market price. Based on this marked price only, the shopkeeper offers a discount of a certain percentage.
The price payable by the customer after the deduction of discount is called the selling price.
That is, Selling Price = Marked Price – Discount

TNPSC Aptitude and Mental Ability  – Percentage topic question and answers solutions PDF, Notes and Study Materials were given below,

### Aptitude and Mental Ability  – Percentage:

1. Thendral saved one-fourth of her salary. Her savings percentage is

(i) 3/4% (ii) 1/4% (iii) 25% (iv) 1%

2.  Kavin scored 15 out of 25 in a test. The percentage of his marks is

(i) 60% (ii) 15% (iii) 25% (iv) 15/25

3. 0.07% is

(i) 7/10 (ii) 7/100 (iii) 7/1000 (iv) 7/10,000

4. Decimal value of 142.5% is

(i) 1.425 (ii) 0.1425 (iii) 142.5 (iv) 14.25

5. The percentage of 0.005 is

(i) 0.005% (ii) 5% (iii) 0.5% (iv) 0.05%

6. The percentage of 4.7 is

(i) 0.47% (ii) 4.7% (iii) 47% (iv) 470%

7. The interest for a principle of  Rs.4,500 which gives an amount of Rs.5,000 at end of certain period is

(i) Rs.500 (ii) Rs.200 (iii) Rs.20% (iv) Rs.15%

8. Which among the following is the simple interest for the principle of Rs. 1,000 for one year atthe rate of 10% interest per annum?

(i) Rs200 (ii) Rs 10 (iii) Rs 100 (iv) Rs 1,000

9. Which among the following rate of interest yields an interest of ₹ 200 for the principle of ₹ 2,000 for one year.

(i) 10% (ii) 20% (iii) 5% (iv) 15%

10. 12% of 250 litres is the same as ________of 150 litres.

(a) 10% (b) 15% (c) 20% (d) 30%

11. If three candidates A, B, and C is a 3 school election got 153,245 and 102 votes respectively, the percentage of votes for the winner is___________.

(a) 48% (b) 49% (c) 50% (d) 45%

12. 15% of 25% of 10000 =___________.

(a) 375 b) 400 c) 425 d) 475

13. When 60 is subtracted from 60% of a number to give 60, the number is

(a) 60 (b) 100 (c) 150 (d) 200

14. If 48% of 48 = 64% of x , then x =

(a) 64 (b) 56 (c) 42 (d) 36

15. A fruit vendor sells fruits for Rs 200 gaining Rs 40. His gain percentage is

(a) 20% (b) 22% (c) 25% (d) 16 2/3%

16. By selling a flower pot for Rs 528, a woman gains 20%. At what price should she sell it to gain 25%?

(a) Rs 500 (b) Rs 550 (c) Rs 553 (d) Rs 573

17. A man buys an article for Rs 150 and makes overhead expenses which are 12% of the cost price. At what price must he sell it to gain 5%?

(a) Rs 180 (b) Rs 168 (c) Rs 176.40 (d) Rs 85

18. The price of a hat is Rs 210. What is the marked price of the hat if it is bought at a 16% discount?

(a) Rs 243 (b) Rs 176 (c) Rs 230 (d) Rs 250

19. The single discount which is equivalent to two successive discounts of 20% and 25% is

(a) 40% (b) 45% (c) 5% (d) 22.5%

20. The number of conversion periods, if the interest on a principal is compounded every two months is______.

(a) 2 (b) 4 (c) 6 (d) 12

21. The time taken for Rs 4400 to become Rs 4851 at 10%, compounded half-yearly is _______.

(a) 6 months (b) 1 year (c) 1 1/2 years (d) 2 years

22. The cost of a machine is Rs 18000 and it depreciates at 16 23 % annually. Its value after 2 years will be_____.

(a) Rs 12000 (b) Rs 12500 (c) Rs 15000 (d)Rs 16500

23. The sum which amounts to Rs 2662 at 10% p.a in 3 years compounded yearly is_______.

(a) Rs 2000 (b) Rs 1800 (c) Rs 1500 (d) Rs 2500

24. The difference between simple and compound interest on a certain sum of money for 2 years at 2% p.a is ₹1. The sum of money is______ .

(a) Rs 2000 (b) Rs 1500 (c) Rs 3000 (d) Rs 2500