Compute the product.

Question

Compute the product. ​  ​

Quizplus · Accepted Answer

The last 4 digits of the product are obtained by multiplying the last 4 digits of both numbers. Therefore, the last 4 digits of the product will be 0x4f = 0xf. This eliminates choices A, C and D which have different last 4 digits. Now, looking at the 5th digit from the right of the product, we need to add 1 to the 5th digit from the right of the multiplier because the corresponding digit of the multiplicand is odd. So, the 5th digit from the right of the product will be 3+1=4. This eliminates choice A, which has a 5 in the 5th digit from the right. Now we are left with choice B, which satisfies both conditions.

Compute the Product. ​ ​

Compute the Product.