The HCF and LCM of two numbers are 21 and 4641 respectively. If one of the numbers lies between 200 and 300, then the two numbers are-

An article is sold for Rs 4,777 after giving a discount of 15%. What is the marked price of the article?

Evaluate: $$ {9।3-5।-5।-5।4।÷10\over-3(5)-2×4÷2}$$

 If $$ {x=7-4\sqrt{3}}$$ find the value of $$ {\sqrt{x}+{1\over {\sqrt{x}}}}$$.

The cost price of 20 articles is the same as the selling price of x articles. If there is 25% gain, then the value of x

At what simple rate of interest a sum is double in 8 years?

The product of two numbers is 2028 and their HCF is 13. The number of such pair is-

In a school $${1\over10} $$ of the boys are same in number as $${1\over4}$$ of the girls and  $${5\over8} $$ of the girls are same in number as $${1\over4}$$   of the boys. The ratio of the boys to girls in that school is: