Question

19+17+15+13+7+5+3+1

Which of the following is another way of writing the sum of the numbers shown?

A.4×18
B.4×19
C.4×20
D.4×21

Answer 1

4 x 20

Explanation:

Step 1. Add all the numbers 19+17+15+13+7+5+3+1 = 80

Step 2. Find the equation that matches the sum. Eliminate the answers you know are wrong. 4 x 20 = 80 is another way of writing all those numbers.

Hope this helps and thanks :)

Answer 2

Answer: C

4×20=80

19+17+15+13+7+5+3+1 = 80