Brain Test Math Trick

Brain Test Level 315: Find the answer.

Brain Test Level 315

Hard

Screenshots

Brain Test Level 315 screenshot 1Brain Test Level 315 screenshot 2
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Quick Answer

Solve the system of equations to find that Apple + Pear + Orange = 15, then enter 15 and tap the checkmark.

Skills Tested

LogicProblem Solving

Step-by-Step Solution

  1. 1) Read the equations that show a number for one apple, one pear and one orange.
  2. 2) Add the three single-fruit values together to get a sum.
  3. 3) Confirm that Apple + Pear + Orange equals 15.
  4. 4) Type 15 on the number pad and tap the checkmark to finish.

Hint

Reveal a hint

Combine the fruit values you can already see into a sum.

Why It Works

Each fruit stands for a number revealed by the shown equations. Adding one of each together totals 15, so you enter 15 rather than multiplying or guessing.

Frequently asked questions

What is the answer to Brain Test level 315?

Enter 15, which is the total of Apple + Pear + Orange from the equations shown on screen.

How do I work out the fruit sum in Brain Test level 315?

Add the value of one apple, one pear and one orange, which together give you 15.

What is the trick in Brain Test level 315?

You must compute a sum from the fruit equations instead of picking a random or multiplied number.

Why is the answer not a bigger number in Brain Test level 315?

The equations ask for one of each fruit only, so the result is the simple total of 15.

Where does the value 15 come from in Brain Test level 315?

It comes from adding the single-fruit values that the on-screen equations already reveal.

Is there a video walkthrough for Brain Test level 315?

Yes, the embedded video on this page shows how to sum the fruits and enter 15 to pass.