marc and Aki are building hot wheels marc has a four-inch pieces to make and Aki has a 10-inch pieces. How long will their tracks be when they are first the same length.

Question

30 inches
40 inches
50 inches
20 inches

Answer 1

To find out when their tracks will be the same length, we need to find the least common multiple (LCM) of 4 and 10.

The prime factorization of 4 is 2 x 2 and the prime factorization of 10 is 2 x 5.

The LCM is found by taking the highest power of each prime factor:
LCM = 2 x 2 x 5 = 20 inches.

Therefore, their tracks will be the same length when they reach 20 inches.