Question
Select the set in which the numbers are related in the
same way as are the numbers of the following sets. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g., 13 - operation on 13 such as adding/subtracting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed) (15, 100, 25)Solution
The logic followed here is as follows (3rd number - 1st number)Β² = 2nd number (15, 100, 25) β (25 β 15)Β² = 10Β² = 100. (12, 49, 19) β (19 β 12)Β² = 7Β² = 49. (28, 49, 35) β (35 β 28)Β² = 7Β² = 49. (19, 81, 28) β (28 β 19)Β² = 9Β² = 81. (10, 30, 15) β (15 β 10)Β² = 5Β² = 25.
- The price of electricity rose by 40%. Ravi, in response, reduced his usage by 25%. Determine the change in his electricity bill.
Ravi scored 35% in an exam and failed by 40 marks. Meena scored 50% and crossed the passing mark by 20 marks. What are the passing marks of the test?
- Rohit used to earn Rs. 42,000 per month. His spending to saving ratio was 5:9. After a salary increment, he reduced his expenses by 20% and his savings inc...
A fruit seller has a certain number of apples of which 10% are rotten. He sells 91% of the remainder and then 405 apples are left. How many apples he bo...
Hari scored 70 marks in English. He scored 64% marks in Hindi and X marks in Maths. The maximum marks for each subject is 175. The overall percentage of...
Monthly income of A is Rs. 55000 out of which he spent 21%, 9% and 22% of his total income in rent, medicine and transportation, respectively. Find his ...
A girl spent 30% of her monthly income on clothing. Of the remaining, she spent on travel and food in the ratio of 4:3. If the difference of the income ...
The income of Tina is Rs.24000 and she saves 15% of her income. The savings of Kajal is Rs.2000 more than that of Tina and she spends 60% of her income....
A candidate who gets 25% marks fails by 12 marks but another candidate who gets 45% marks gets 10% more than the passing marks. Find the maximum marks.
- Ravi appeared for two papers: Physics and Chemistry. He scored 68 out of 80 in Physics and 74 out of 85 in Chemistry. Calculate his total percentage marks.