There are 4 questions thank you for helping me Question 1 : The ratio of boys to girls is 10 to 11. If there are 55 girls how many boys are there?

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Question 2 : if a number cube is rolled, what is the probability of rolling a prime number?

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Question 3 : how many inches are in one yard? Two yards?

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Question 4 : Jaime knows that 30² is 900. He wonders if knowing 30² can help him find 29x31. Raquel knows what 25² equals. How can she use the knowledge to find 24x26?