On rolling two dices (six-sided normal dice) together, what is the probability that the first one comes up with a 2 and the second one comes up with a 5?
We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?
* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.