Mathematics & Logic
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271
A bag contains ₹1, 50 paise and 25 paise coins in the ratio 5 : 9 : 25. If the total value of the money is ₹1,008, find the number of 50 paise coins.
Hard
Mathematics & Logic
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272
If (a + b) : (b + c) : (c + a) = 6 : 7 : 8 and a + b + c = 14, then find the value of c.
Hard
Mathematics & Logic
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273
If a/b = 1/3, b/c = 2, c/d = 1/2, d/e = 3 and e/f = 1/4, then find the value of abc/def.
Hard
Mathematics & Logic
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274
The ratio of zinc and copper in brass is 13 : 7. How much zinc is there in 100 kg of brass?
Easy
Mathematics & Logic, Science
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275
The ratio of the volume of two spheres is 8 : 27. What is the ratio of their surface areas?
Medium
Mathematics & Logic
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276
A mixture contains alcohol and water in the ratio 4 : 3. If 5 liters of water is added to the mixture, the ratio becomes 4 : 5. Find the quantity of alcohol in the given mixture.
Easy
Mathematics & Logic
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277
The fourth proportional to 0.12, 0.21 and 8 is:
Easy
Mathematics & Logic
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278
If x : y = 3 : 4, then the value of (5x - 2y) : (7x + 2y) is:
Easy
Mathematics & Logic
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279
The ratio of the number of sides of two regular polygons is 1 : 2, and the ratio of their interior angles is 3 : 4. Find the number of sides of these polygons.
Hard
Mathematics & Logic
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280
If a : b = 2 : 3 and b : c = 4 : 5, then find a² : b² : bc.
Medium
Mathematics & Logic
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281
A sum of ₹6,200 is divided into three parts proportional to 1/2 : 1/3 : 1/5. Find the smallest part.
Medium
Mathematics & Logic
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282
Find a third proportional to 9 and 12.
Easy
Mathematics & Logic
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283
Three numbers are in the ratio 1/2 : 2/3 : 3/4. The difference between the largest and the smallest numbers is 36. Find the numbers.
Medium
Mathematics & Logic
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284
If (a + b) : (a - b) = 15 : 1, then (a² - b²) : (a² + b²) is:
Hard
Mathematics & Logic
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285
The ratio of boys and girls in a school is 9 : 5. If there are 320 more boys than girls, find the total number of students.
Easy
Mathematics & Logic
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