You have three numbers. The sum of these numbers are 7.2. The second number is twice as large as the first one. The third number is three times as large as the first one.

Kale Sampson

Kale Sampson

Answered question

2022-11-08

You have three numbers. The sum of these numbers are 7.2. The second number is twice as large as the first one. The third number is three times as large as the first one.
This is easily solveable by setting up an equation system such as:
a + b + c = 7.2
b = 2 a
c = 3 a

Answer & Explanation

Justin Blake

Justin Blake

Beginner2022-11-09Added 11 answers

"If the second number is twice as large as the first one, and the third number is three times as large, then all three numbers together are six times as large as the first one alone."
Knowing that all three numbers together also equal 7.2, an attentive student's intuition should lead him to the solution without any formal arithmetic at all. In particular, it should be immediately apparent what the first number is.

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