Number System
In how many different ways can 7 boys and 3 girls sit in a row such that all the three girls do not sit together ?

3086880
3386880
3286880
3186880

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Number System
A number consists of two digits whose sum is 8. If 18 is subtracted from the number, the place of digits get interchanged. Find the number.

35
53
46
32

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