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Is 78 prime?
78 is not prime. No even number (except 2) is prime. Remember the definition. A prime number is exactly divisible only by itself and 1.
Which two prime number that equal 78?
How about: 73+5 = 78
What is the greatest common factor of 56 78 and 130?
To find the greatest common factor (GCF) of 56, 78, and 130, we first need to find the prime factors of each number. The prime factors of 56 are 2 x 2 x 2 x 7, the prime factors of 78 are 2 x 3 x 13, and the prime factors of 130 are 2 x 5 x 13. To find the GCF, we look for the common prime factors among the numbers, which are 2 and 13. Therefore, the GCF of 56, 78, and 130 is 2 x 13 = 26.
What is a factor tree of 78?
78 6 x 13 (2x3) x 13 Since 2, 3, and 13 are prime numbers, the factor tree is complete.
What two digit numbers have the most factors in their prime factorization?
One way to solve this is to multiply the lowest prime numbers together, starting from 2: 2x3=6. 6x5=30. Multiplying by 7 would yield a 3-digit number, so we are looking for all 2-digit numbers with 3 distinct prime factors. We already have 30. 2x3x7=42. 2x3x11=66. 2x3x13=78. 2x5x7=70. So, to answer the original question, the 2-digit numbers that have the most factors in their prime factorization are, in ascending order, 30, 42, 66, 70, and 78.
