Advanced MathEasyTotal from three related amounts
Advanced Math practice question
Kai has n marbles. Ali has 3 times as many marbles as Kai, and Bea has 2 more marbles than Kai. Which expression represents the total number of marbles the three have?
- A. 5n + 2Correct
- B. 3n + 2
- C. 6n
- D. 5n
Answer: A. 5n + 2
n + 3n + (n + 2) = 5n + 2.
Why the other answers are wrong
- B. 3n + 2
- 3n + 2 leaves out Kai's own n.
- C. 6n
- 6n treats Bea's 2 as 2n.
- D. 5n
- 5n drops Bea's extra 2.
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