When passed the entries in debit note or credit note. 

Sir what is the assumed mean of first 10 natural numbers 

How possible Sir rectangular is a parallelgram  with one angle is 90

Why i can not save many posts

 _ +  _ +  _ = 30 (Fill the blank by using numbers 1, 3, 5, 7, 9, 11, 13, 15)

u can also repeat the no.also

In ABC, AD perpendicular to BC. Prove that AB² - BD² = AC² - CD²? 

How many terms of the Arithmetic Progression 9, 17, 25....must be taken to get a sum of 450?

Can I calculate  all areas first  and foremost total area of 13.1 7th question 

Without expanding prove that determinant

     b² c².       bc.          b+c

     c² a².       ca.          c+a

     a² b².        ab.         a+b