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Sum of 27 numbers = 27 ×25 = 675 Sum of first 13 numbers = 13×16 = 208 Sum of last 13 numbers = 13×19 = 247 Therefore, 27thnumber = 675 – (208 + 247) = 220
Three numbers are in ratio 5:6:7. If the sum of the squares of those three numbers is 440 then find the sum of the three numbers.
If the mean proportion of 2.25 and 1 is 'k', then find the value of '4k'.
Marks scored by A and B in a test are in the ratio 15:7 respectively. If B had scored 10 more marks, then marks scored by A would be 25% more than that ...
5 years ago ratio of the ages of the two persons A and B was 3:1. 3 years hence the ratio of their ages will be 7:3. Find the present age of B.
A sum of ₹12,000 is divided among A, B, and C in the ratio 3:4:5. If A and B donate 25% and 20% of their shares respectively to a charity, how much mo...
A total of Rs. 6,239 is divided among three individuals—'A,' 'B,' and 'C.' The sum allocated to 'C' is two-thirds of what 'B' receives, and 'A' gets a...
The ratio of the number of girls to the number of boys in a school of 720 students is 3 : 5. If 18 boys left the school, find how many new girls ...
Find the third proportional to 12 and 42?
A, B and C entered into a partnership by investing in the ratio of 5:2:4. At the end of the year, the total profit is in the ratio of 10:2:8. Find the r...
300 is divided into two parts such that thrice of the first part and twice of the second part are in ratio 21:16, respectively. Find the difference betw...
