Book Maths Puzzle Numerical Ability

zafars marks his goods at such a price that after allowing a discount of 12% for cash payment, he still makes a profit of 10%. find the marked price of the article which cost him rs. 7000

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Book Other Question

I walk a certain distance and ride back by taking 25/4 hr altogether .Icould walk both ways in 31/4 hr.how long would it take me to ride both ways? 1/2+√5 + 1/√5+√6 + 1/√6+√7 +1/√7+√8 +1/√8+3 is