Mathematics & Logic
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151
If (x : y) = 2 : 1, then find the value of (x² - y²) : (x² + y²).
Easy
Mathematics & Logic
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152
What is the sub-duplicate ratio of 64 : 81?
Easy
Mathematics & Logic
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153
What is the triplicate ratio of 3 : 4?
Easy
Mathematics & Logic
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154
A bag contains coins of ₹1, 50-paisa and 25-paisa in the ratio 5 : 6 : 8. If the total amount in the bag is ₹210, find the number of 50-paisa coins.
Hard
Mathematics & Logic
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155
Find the duplicate ratio of 4 : 5.
Easy
Mathematics & Logic
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156
Divide ₹672 in the ratio 5 : 3.
Easy
Mathematics & Logic
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157
The ratio of boys to girls in a class is 7 : 4. If there are 28 girls, what is the total number of students in the class?
Easy
Mathematics & Logic
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158
Two numbers are in the ratio 3 : 5. If 10 is added to each, the ratio becomes 5 : 7. Find the numbers.
Medium
Mathematics & Logic
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159
A sum of money is to be distributed among A, B, C, D in the ratio 5 : 2 : 4 : 3. If C gets ₹1000 more than D, what is B's share?
Medium
Mathematics & Logic
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160
The ratio of the number of sides of two regular polygons is 1 : 2 and the ratio of their interior angles is 2 : 3. Find the number of sides of these polygons.
Hard
Mathematics & Logic
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161
The ratio of land to water on the whole earth is 1 : 2 and in the Northern Hemisphere, it is 2 : 3. What is the ratio of land to water in the Southern Hemisphere?
Hard
Mathematics & Logic, Geography
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162
The mean proportional of (3 + √2) and (12 - √32) is:
Hard
Mathematics & Logic
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163
If a : b = 1/2 : 3/8, b : c = 1/3 : 5/9 and c : d = 5/6 : 3/4, then find the ratio a : b : c : d.
Hard
Mathematics & Logic
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164
Find the ratio of the surface areas of two spheres whose volumes are in the ratio 64 : 27.
Medium
Mathematics & Logic
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165
If a, b, c are in continued proportion, then (a² + b²) / (b² + c²) is equal to:
Hard
Mathematics & Logic
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