The probability of rolling any number on a weight 6-sided die, with faces number 1 through 6, is directly proportional to the number rolled. What is the probability of getting 5, if the die is rolled only once?

What is the ratio of the sum of the even positive integers between 1 and 100 (inclusive) and the sum of the od...

Arif is now 5 times as old as Babu, but 7 years now he will be 3 times as old as babu. How old is Arif now?

If x is an even number, what is the difference between the smallest ever number grater than (5x+6) and the lar...

Babu gave 20% of his marbles to Sadeq, and 20% of the rest of marbles to Tipu. If he now has 320 marbles, how...

What is the radius of the in-circle of the triangle whose sides measure 5, 12 and 13 units?

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