Can you calculate the probability of getting a sum of six when a dice is thrown twice?
Can you find out the remainder when 3^300 is divided by 5?
There is a square of a particular number which when doubled, becomes 7 more than its quarter.
Can you find the number?
Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?
? : 3839 :: 11 : 1209
Our product and our sum always give the same answer. Who are we?
I want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and the cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.
How Long will it take to fill the bucket?
Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.
Can you find out which number multiplied by itself will give the output as 12345678987654321?
What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?
Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211
How do you go from 98 to 720 using just one letter?
In 2011, people playing Foldit, an online puzzle game about protein folding, resolved the structure of an enzyme that causes an Aids-like disease in monkeys. Researchers had been working on the problem for 13 years. The gamers solved it in three weeks.
