A zoo has some lions and parrots. The keeper counted 15 heads and 50 legs. Number of lions is

In an enclosure there are crows and cows. If there are 30 heads and 100 legs, what is the ratio of cows to crows?

Which of the following is a prime number?

The value of a 2-digit number is 5 times the sum of the digits. What is the product of the digits ?

A sum of ₹12 consists of 30 coins of either 50-paise or 25-paise. Number of each type respectively?

The first pair of numbers bear a certain relationship. The same relationship is required to be found in the other pair, Find that missing number : 35 : 6 : : 120 :?