Tricky Test 2 Level 9

Overview

This level is a short algebra puzzle presented as an animal weighing problem. The header says "Find x." and below it three equations are stacked: a pink rabbit plus a black-and-white cow equals 7 kg, a brown dog plus the rabbit equals 11 kg, and the cow plus the dog equals 10 kg. The bottom equation asks for the combined weight of the dog, the cow, and the rabbit, which equals x. Four answer buttons line the bottom: 7, 12, 14, and 28. The solution is to add all three equations together and divide by two, which gives x = 14 kg.

• Difficulty: Regular
• Estimated moves: 1 tap

Step-by-Step Solution

1. Read the three equations. Let R be the rabbit, C the cow, and D the dog:

• R + C = 7
• D + R = 11
• C + D = 10

1. Add all three left sides together: (R + C) + (D + R) + (C + D) = 2R + 2C + 2D = 2(R + C + D).
2. Add all three right sides together: 7 + 11 + 10 = 28.
3. Therefore 2(R + C + D) = 28, so R + C + D = 14. The bottom equation asks for exactly D + C + R, which is x.
4. x = 14. Tap the answer button labeled "14" (it is the third button from the left; the others read 7, 12, and 28).
5. The level completes immediately on the correct tap; the success animation plays over the unchanged equations.

Strategy & Reasoning

You do not actually need to solve for each animal individually. Solving for R, C, and D individually would give R = 4, C = 3, D = 7, which sums to 14, but that is slower. The shortcut is to notice that every animal appears in exactly two of the three equations, so adding all three equations gives twice the total you want.

The distractor answers are chosen to catch common arithmetic slips. Tapping 7 is just copying the first equation's result. Tapping 28 is forgetting to divide by two (28 is the sum of the three right sides, before halving). Tapping 12 is an off-by-arithmetic error. The correct answer, 14, is exactly half of 28.

There is no wordplay, no hidden object, and no device trick on this level — it is one of the few genuinely mathematical puzzles in the game. The animals are just icons standing in for variables.

Tips & Common Mistakes

• Common mistake: Adding 7 + 11 + 10 = 28 and tapping 28, forgetting that each animal was counted twice. You must divide by two to get 14.
• Common mistake: Trying to solve each animal one at a time and making an arithmetic error. The shortcut of summing all three equations is faster and less error-prone.
• Common mistake: Tapping 7 because it is the first number you see. 7 is just R + C, not the total.
• Tip: If you want to verify individually: R = 4, C = 3, D = 7, and 4 + 3 + 7 = 14.
• Tip: The answer buttons are circular; "14" is the third one from the left.