A number consists of two digits whose sum Is 9. If 27 is subtracted from the number, its digits are reversed. The number is :

A wholesaler purchased 7 hair clips for a rupee. How many for a rupee must he sell to get profit of 40%

Sum of two positive integers is 10 while their product is 24 What is the LCM of these numbers ?

Read the given statement( s) and conclusions carefully. Assuming that the information in the statement(s) is true, even if they appear to be at variance with commonly known facts, select which of the conclusions logically follow(s) from the statement(s) beyond reasonable doubt.
Statements:
All crayons are pens
All pens are nibs
Conclusions:
(I) All crayons are nibs
(II) All nibs are crayons

A bag contains 10 pairs of socks (each pair of different colour). How many draws are required at the most to get a matching pair ?