100+ TNPSC Percentage Questions with Answers - 1

Ans: D

Let the original price be Rs. 100 per kg.

Money required to buy 49 kg of rice = Rs. (100 × 49) = Rs. 4900.

New price = Rs. 98 per kg.

∴ Quantity of rice bought = $$({4900} /{98})$$ kg = 50 kg.

Ans: A

Cost price of wrist watch = Rs. 1250

Sale price of wrist watch = Rs. 1500

Profit percent = $$({1500 - 1250} / {1250}) × 100$$

                    = $${ 250} / {1250} × 100$$

                   = $${ 25000} / {1250}$$ = 20%.

Ans: B

Correct time = 3 hrs 40 min = (3 × 60 + 40) min = 220 min.

Error = 5.5 min.

∴ Error % = $$({5.5} /{220} × 100)$$% = $${5}/{2}$$% = 2.5%.

Ans: B

10% of 5 + 5% of 10 = $$({10}/{100} × 5)$$ + $$({5}/{100} × 10)$$ = 0.5 + 0.5 = 1.0.

Ans: C

Number of short length coats before removal = (100 – 15)% of 800

= 85% of 800 = $$({{85}/{100} × 800)$$ = 680.

Number of short length coats after removal = (680 – 500) = 180.

Total number of coats after removal = (800 – 500) = 300.

Number of full length coats after removal = (300 – 180) = 120.

∴ Required percentage = $$({120} / {300} × 100)$$% = 40%.