Tag: math & puzzles

If Rohan is sitting on a chair numbered 112, Manaj is sitting on a chair numbered 78 & Neha is sitting on a chair numbered 56 then what's the chair number of Rohit?

what's the probability of getting a odd prime number while rolling a fair dice.

There are 30 red balls, 40 black balls & 60 white balls in a bag in a dark room. How many balls you have to take from the bag to ensure that you have atleast a ball of each colour with you.

In a pack of cards you picked 2 cards without replacement. what's the probability of getting 2 Kings?

what's the probability of getting atleast 3 heads out of 4 tosses by a fair coin

How many 4 digit numbers can be formed using the digits 9,8,7,5,0 without repeting the digits?

Larry's father has five sons named Ten, Twenty, Thirty, Forty...Guess what would be the name of the fifth?

What is the probability of choosing a prime number from the numbers 90 to 100 inclusive?

In which quadrilateral are all of these true: a) 'only' the opposite sides are the same length ; b) the opposite sides are parallel; c) the opposite angles are equal?