यदि संख्या 34 ( ) 24,9 से विभाजित हो तो रिक्त स्थान पर क्या होगा
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3+4+x+2+4 multiple of 9
13+x multiple of 9
x is digit so have value from 0 to 9
13+x has value from 13 to 22
between 13 to 22 only 18 is multiple of 9
13+x=18
x=5
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