Mathematics & Logic
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226
Two numbers are in the ratio 3 : 5. If 9 is subtracted from each, the ratio becomes 12 : 23. Find the smaller number.
Medium
Mathematics & Logic
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227
What is the third proportional to 9 and 12?
Easy
Mathematics & Logic
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228
If a : b = 5 : 7 and c : d = 2a : 3b, then ac : bd is:
Hard
Mathematics & Logic
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229
If x : y = 2 : 1, find the value of (5x² + 3xy) : (4x² - y²).
Medium
Mathematics & Logic
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230
The ratio of the number of boys to girls in a school is 7 : 5. If there are 2400 students in total, find the number of girls.
Easy
Mathematics & Logic
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231
The ratio of the area of two squares is 9 : 16. What is the ratio of their perimeters?
Medium
Mathematics & Logic
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232
If (x/y) = (z/w), then (x+z) : (y+w) is equal to:
Hard
Mathematics & Logic
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233
The ratio of two numbers is 3 : 8 and their difference is 115. The smaller number is:
Easy
Mathematics & Logic
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234
If a/3 = b/4 = c/7, then (a + b + c) / c is equal to:
Easy
Mathematics & Logic
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235
The ratio of the incomes of A and B is 3 : 2 and their expenditures are in the ratio 5 : 3. If each saves ₹1,000, find A's income.
Medium
Mathematics & Logic
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236
The monthly incomes of A and B are in the ratio 4 : 5 and their monthly expenditures are in the ratio 7 : 9. If each saves ₹50 per month, find their monthly incomes.
Medium
Mathematics & Logic
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237
If a : b = 2 : 1, then the value of (a² - b²) : (a² + b²) is:
Easy
Mathematics & Logic
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238
The triplicate ratio of 2 : 3 is:
Easy
Mathematics & Logic
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239
If (a + b) : (a - b) = 15 : 1, find the value of (a² + b²) : (a² - b²).
Hard
Mathematics & Logic
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240
Find the mean proportional between 1.21 and 0.09.
Easy
Mathematics & Logic
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