Quantitative Aptitude - Arithmetic Ability Questions

If secA = x, then the value of x is

Two numbers are 10% and 20% lesser than a third number respectively. By how much percent is the second number should be enhanced to make it equal to the first number?

What is the value of 9991 x 10009?

The mean of the 5 smallest numbers from a group is 15 while the mean of all the 13 members of the group taken together is 17. What is the mean of the 8 largest numbers?

If y=2-x1+x, then what is the value of 1y+1 + 2y+1y2-1 ?

Find the least number which when divided by 20, 25, 35 and 40 leaves remainder 14, 19, 29 and 34 respectively?

If the shopkeeper sells an item at Rs 450 which is marked as Rs 600, then what is the discount he is offering?

What is the value of √2 Sec 45° + (1/√3)Tan 30°?