AMC 8 Daily Practice Round 5

Complete problem set with solutions and individual problem pages

Problem 5 Easy

Fill the seven odd numbers 1-13 in each circle so that the sum of each three numbers in a line can be 25. Which number should be filled in the central circle?

  • A.

    1

  • B.

    3

  • C.

    7

  • D.

    11

  • E.

    13

Answer:E

(25\times3-1-3-5-7-9-11-13)\div2=13