Question : The monthly salary of Sachdev gets increased by 5%, thereby his salary becomes Rs. 15120 per annum. His earlier monthly salary (before the increase) was:
Option 1: Rs. 1320
Option 2: Rs. 1200
Option 3: Rs. 1240
Option 4: Rs. 1440
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Correct Answer: Rs. 1200
Solution : Let's assume Sachdev's salary = 100 units After increment of 5%, new salary = 105 units Sachdev's monthly salary = $\frac{15120}{12}$ = Rs. 1260 According to the question, 105 units ⇒ Rs. 1260 Sachdev's salary = $\frac{1260×100}{105}$ = Rs. 1200 Hence, the correct answer is Rs. 1200.
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Question : At what rate of compound interest (compounding annually) per annum will a sum of Rs. 250000 becomes Rs. 275625 in 2 years?
Option 1: 8% per annum
Option 2: 3% per annum
Option 3: 10% per annum
Option 4: 5% per annum
Question : At what rate of compound interest per annum, a sum of Rs. 20,000 becomes Rs. 23,152.50 in 1 year and 6 months compounded half-yearly?
Option 1: 10% per annum
Option 2: 5% per annum
Option 3: 12% per annum
Option 4: 8% per annum
Question : Directions: A father increases the pocket money of his son by 20%. If the son gets Rs. 300 after the increase, find his pocket money before the increase.
Option 1: Rs. 250
Option 2: Rs. 240
Option 3: Rs. 200
Option 4: Rs. 230
Question : The enhanced salary of a man becomes Rs. 24,000 after a 20% increment. His previous salary was:
Option 1: Rs. 20,000
Option 2: Rs. 21,000
Option 3: Rs. 16,000
Option 4: Rs. 18,000
Question : A sum of Rs. 14500 will become Rs. 16675 in 36 months at some rate of simple interest. What is the rate of interest per annum?
Option 1: 6% per annum
Option 3: 4% per annum
Option 4: 7% per annum
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