Question : Three numbers are in the ratio of 1 : 2 : 3. The product of the three numbers is 1296. What is the sum of the three numbers?
Option 1: 36
Option 2: 30
Option 3: 72
Option 4: 24
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Correct Answer: 36
Solution : The ratio of three numbers = 1 : 2 : 3 Product of three numbers = 1296 Let the numbers be $x, 2x$ and $3x$. Product of three numbers $= x × 2x × 3x = 6x^3$ So, 6x$^3$ = 1296 ⇒ $x^3 = \frac{1296}{6} = 216$ ⇒ $x = 6$ So, First number $= x = 6$ Second Number $= 2x = 2 × 6 = 12$ Third Number $= 3x = 3 × 6 = 18$ So, the sum of all numbers = 6 + 12 + 18 = 36 Hence, the correct answer is 36.
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Question : In three positive numbers, the ratio of first and second is 3 : 4 and the ratio of second and third is 3 : 5. The product of first and third is 4500. What is the sum of the three numbers?
Option 1: 282
Option 2: 235
Option 3: 198
Option 4: 205
Question : The sum of the squares of 3 consecutive positive numbers is 365. The sum of the numbers is:
Option 1: 30
Option 2: 33
Option 3: 36
Option 4: 45
Question : The sum of squares of 3 consecutive positive numbers is 365. The sum of the numbers is:
Question : The ratio of two numbers is 3 : 7. The sum of the two numbers is 180. what is the positive difference between the two numbers?
Option 1: 80
Option 2: 72
Option 3: 85
Option 4: 78
Question : The product of two positive numbers is 240. If the ratio of the two numbers is 3 : 5, then what is the sum of the two numbers?
Option 1: 46
Option 2: 45
Option 3: 32
Option 4: 42
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