1 EASY Which of the following is a prime number? $$2$$$$4$$$$6$$$$8$$$$10$$

 2 MEDIUM Which of the following is a composite number? $$1$$$$3$$$$5$$$$7$$$$9$$

 3 MEDIUM Which of the following is NOT a prime number? 27146492391131

 4 MEDIUM Which of the following is a square number? $$19$$$$29$$$$39$$$$49$$$$59$$

 5 MEDIUM What is the largest composite number less than 60?

 6 MEDIUM What is the square of 7?

 7 HARD What is the sum of all the prime number(s) between 1 and 10? 10354517None of the above

 8 HARD What's the largest prime number less than 100?

 9 HARD Which of the following is a perfect square? 6061626364

 10 HARD Which of the following is NOT a perfect square? 2536476481