Problem Solving

Which of the following CANNOT yield an integer when divided by 10?

I. Product of two distinct primes.
II. An integer less than 10.
III. Sum of three consecutive integers.
IV. An odd integer.

A. I and IV only
B. II and IV only
C. II, III, and IV only
D. All I through IV
E. IV only

I. Product of two distinct primes.
The product of 2 and 5 can be divisible by 10. OUT.

II. An integer less than 10.
0 is divisible by 10. OUT

III. Sum of three consecutive integers.
9+10+11 is divisible by 10. OUT

IV. An odd integer.
An odd integer is never divisible by 10. IN

Choose E. Am I right?

-BM-

between B and E.

Thanks
raama

krisraam wrote:between B and E.

Thanks
raama

Nowhere it says that the integers are +ve only.
So B is out. Only E.

-10 is less than 10. -10/10 = -1 an integer.


Remember !!!!!
Integer = +ve and -ve integers and 0.

bluementor wrote:I. Product of two distinct primes.
The product of 2 and 5 can be divisible by 10. OUT.

II. An integer less than 10.
0 is divisible by 10. OUT

III. Sum of three consecutive integers.
9+10+11 is divisible by 10. OUT

IV. An odd integer.
An odd integer is never divisible by 10. IN

Choose E. Am I right?

-BM-

Well done, I arrived at the answer the same way. E.