Question : What is the greatest number which, on dividing 342 and 480, leaves remainders of 6 and 4 respectively?
Option 1: 14
Option 2: 4
Option 3: 7
Option 4: 28
Correct Answer: 28
Solution :
The greatest number on dividing 342 and 480 leaves the remainder 6 and 4 respectively is the HCF of (342 - 6 = 336) and (480 - 4 = 476)
336 = 28 $\times$ 12
476 = 28 $\times$ 17
$\therefore$ HCF (333, 476) is 28.
Hence, the correct answer is 28.
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