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Q.

Find the greatest number of 5 digits, which will give us the remainder of 5 when divided by 8 and 9 respectively.

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a

99921

b

99931

c

99941

d

99951

answer is C.

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Detailed Solution

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The greatest number will be multiple LCM of 8 and 9.
LCM of 8 and 9 = 72

The greatest 5-digit number is 99999. Let's divide it by 72. 
99999÷72 = (1388 x 72) + 63
99999  ÷  72     =     9936     +     63

We want a number that will give us the remainder of 5 when divided by 72.

Therefore, we can add 5 to 9936 to find the number.

The number will be: 9941

 

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Find the greatest number of 5 digits, which will give us the remainder of 5 when divided by 8 and 9 respectively.