1: Among the four numbers 1, 2, 5 and 15, the prime number has () and the combined number has (), () is the common factor of these numbers 2: The minute hand of the clock goes from 3:25 to 3:40, and the minute hand () rotates () degrees 3: A is a natural number greater than 0. The greatest common factor of a is () and the least common multiple is 5: The numerator of a fraction is the smallest composite number, and the denominator is the smallest composite number in the odd number. The fraction is () 6: 350ml=( )L 7: The greatest common factor of 24 and 42 is (), 24 times () to get the least common multiple of 24 and 42

1: Among the four numbers 1, 2, 5 and 15, the prime number has () and the combined number has (), () is the common factor of these numbers 2: The minute hand of the clock goes from 3:25 to 3:40, and the minute hand () rotates () degrees 3: A is a natural number greater than 0. The greatest common factor of a is () and the least common multiple is 5: The numerator of a fraction is the smallest composite number, and the denominator is the smallest composite number in the odd number. The fraction is () 6: 350ml=( )L 7: The greatest common factor of 24 and 42 is (), 24 times () to get the least common multiple of 24 and 42

1: Among the four numbers 1, 2, 5 and 15, prime number (2 and 5) combined number (15) and (1) is the common factor of these numbers. 2: the minute hand of the clock goes from 3:25 to 3:40, and the minute hand (90 degrees) rotates clockwise by (7.5) degrees. 3: A is a natural number greater than 0. The greatest common factor of a is (a), and the least common multiple is (a) 5: