The smallest number, which when added to 680621 gives the sum a perfect square number, will be

Natu and Buchku each have certain number of oranges. Natu says to Buchku, “If you give me 10 of your oranges, I will have twice the number of oranges left with you”. Buchku replies,“If you give me 10 of your oranges, I will have the same number of oranges as left with you”. What is the number of oranges with Natu and Buchku, respectively?

The sum of square of three positive integers is 323. If the sum of squares of two numbers is twice the third, their product is

If 30% of a = b, then b% of 50 is the same as:

Amit ranked 7th from the top and 26th from the bottom in his class. How many students are there in the class?

For which value of x the seven-digit number 8439x53 is divisible by 99?

Which of the following numbers is not a prime number?

Evaluate 743 x 999.