Question

Which of the following is divisible by all of the integers from 1 to 10?

A) 23x34
B) 34x45
C) 45x56
D) 56x67
E) 67x78​

Answer 1

B or C or A or E or D i dont know

Explanation:

Answer 2

C.

Explanation:

The result of the multiplication must end in 0 so A, D nor E are the answer.

Consider B:

34 * 45

Neither of the numbers are divisible by 7 so it's not this one.

It's C because:

56 is divisible by 1, 2,4,7,8 and

45 is divisible by 3, 5, 9

The factors contain 2 and 3 so its also divisible by 2*3 = 6.

The product ends in 0 so its also divisible by 10.