Which of the following numbers has 6 as its factor?
1536
1951
38
65
A factor of a number is an exact divisor of that number.
Out of the given options, only 1536 is divisible by 6.
Hence, 1536 has 6 as a factor.
Which of the following numbers has both 7 and 5 as factors?
A number a has 7 as its smallest prime factor, and another number b has 3 as its smallest prime factor. What is the smallest prime factor of the number a−b?