The length, breadth and height of a room are in the ratio 7:3:1. If the breadth and height are doubled while the length is halved, then by what percent the total area of the 4 walls of the room will be increased?

Deepak starts the month of February with provisions expected to last for the entire month. After few days, he find that the provisions will be short by 10 days and it is calculated that if the provisions left is immediately tripled, it will complete the shortfall. If the provisions left is doubled instead of being tripled, and simultaneously the diet of the Deepak is decreased by 20%, then the provisions will fall short by-

What is the value of X ?, if 7580 - X = 3440

Medha sells her bag for ₹ 300 and loses ₹ 60. At what price must she sell the article to gain 15%?

The difference between the selling prices of a keyboard at losses 15% and 25% is Rs. 50. Then the cost price of a keyboard is :

If 3 added to both the numerator and the denominator, the fraction becomes 10/11 when 4 is subtracted from both the 4 numerator and the denominator of the same fraction, it becomes ¾. What is the value of the fraction?

If the number x3339 is divisible by 11, what is the face value of x?

The HCF of 156, 312 and 195 is :