Q1. In a circle of radius 11 cm, CD is a diameter and AB is a chord of length 20.5 cm. If AB and CD intersect at a point E inside the circle and CE ha...

Q1. With rectangular axes of coordinates, the number of paths from (1,1) to (8,10) via (4,6), where each step from any point (x,y) is either to (x,y+...

@shivangi-garg SOLUTION x0 = 100 (If all 100 had their birthdays on January)If x0 = 3 (Not possible, because all x1 ,.....x12 together will be ...

@neraj-naiyar sir, Side of the rhombus = 20 cm Let the diagonals be 4x and 3x. They bisect each other at right angles, thereby creating 4 identica...

If f(x + 2) = f(x) + f(x + 1) for all positive integers x, and f(11) = 91, f(15) = 617, then f(10) equals.

A trader sells 10 litres of a mixture of paints A and B, where the amount of B in the mixture does not exceed that of A. The cost of paint A per litre...

Q1.If we rolled a dice 3 times. In how many ways we can get a sum of 8? Q2. In how many ways we can pick 4 numbers from first 20 natural numbers s...

@ujjwal-dwivedi (6,1,1) = 3 ways (5,2,1) = 6 ways (4,2,2) = 3 ways (4,3,1) = 6 ways (3,3,2) = 3 ways The total no. of ways = 21 ways

In how many ways we can pick 4 numbers from first 20 natural numbers such that there is at least a gap of one number between any two picked numbers?

Two ships are approaching a port along straight routes at constant speeds. Initially, the two ships and the port formed an equilateral triangle with s...

Q1.)A group of N people worked on a project. They finished 35% of the project by working 7 hours a day for 10 days. Thereafter, 10 people left the gro...