Question

{1,2,3,...,75,76,78} how many numbers in the set above have 2 as a factor but not have 10 as a factor

Answer 1

Answer:

A) 32

Step-by-step explanation:

From 1 to 10 we have 4 numbers which are {2,4,6,8}

From 10 to 20 we have 4 numbers which are {12,14,16,18}

.

.

.

From 70 to 78 we have 4 numbers which are {72,747,6,78}

conclusion: we 4×8 number = 32