Divide the given number by 7.i.e 10000÷7...
you may got some remainder. subtract the remainder from 10000 will give highest number which is divisible by 7.No other formula is present.its the easy way.
here 10000÷7=1428 will be quotient and 4 will be remainder. so 10000-4=9996 will be highest number divisible by 7.
LIKE IF SATISFIED