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Question

Q. If 24 is subtracted from a number, it reduces to its four-seventh. What is the sum of the digits of that number ?

Q. यदि 24 को एक संख्या से घटाया जाता है, तो यह घटकर इसके 4/7 वें भाग के बराबर हो जाती है। उस संख्या के अंकों का योग क्या है?

A

13
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B

56
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C

9
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D

11
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Solution

The correct option is D
11
Let us assume the number as ‘n’.
According to the question,
If 24 is subtracted, it becomes 4/7 of the number.
n24=n×47n4n7=24(7n4n)7=273n7=243n=24×7n=24×73n=8×7n=56Sum of the digit of the number = 5+6 = 11


माना की संख्या n है
प्रश्न के अनुसार,
यदि 24 को घटाया जाता है, तो यह संख्या का 47 हो जाती है।
n24=n×47n4n7=24(7n4n)7=273n7=243n=24×7n=24×73n=8×7n=56
संख्या के अंकों का योग = 5 + 6 = 11


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