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Solution: Fruit Math

Answer: LIFE

Authors: Bryce Cai, Dan Simon

Devs: Jenna Himawan, Dan Simon, Bryce Cai

We start with a typical “fruit math” problem with 11 variables/fruits.

The fourth equation is a good place to start. After using the strawberry value to get a few other values (grape, watermelon, peach) easily, it becomes apparent that all the intended values are positive integers*, which makes the rest of the problem solvable quickly with guess-and-check.

Of note is that each of the 11 fruits appears uniquely as the right-hand side of one of the equations. Converting the values to letters via A=1, …, Z=26 and reading down yields a clue phrase:

*There is an alternate solution that uses non-integer values, but looking ahead to A1Z26 the values should deter solvers from pursuing this.

ImageFruitValueLetter
a bunch of round purple fruits with a brown stem and a green leafgrape19S
a round citrus fruit with a rough peel and a small green stemdekopon21U
a round fruit with mottled pink skin with yellow undertonespeach9I
a red fruit with an upside-down teardrop shape, many small achenes, a green stem, and some leaves at the topstrawberry11K
a green fruit that has a narrow top section and round bottom section, and a brown stem on toppear1A
a small round fruit with a long green stem ending in a thicker brown segmentcherry6F
an orange fruit with a flattened-sphere shape, with a short green stem and four green leavespersimmon18R
a shiny, round, red fruit with small "feet" at the bottom and a brown stem with a leaf on topapple21U
a round fruit with a beige rind with small green dotsmelon9I
a round fruit whose rind is green with darker green stripeswatermelon20T
an oval-shaped fruit made of many small gold-and-brown sections, each of which has a spike growing out of it, with green leaves growing in a tall pillar at the toppineapple19S

SUIKA FRUITS (matching the (5 6) enumeration at the bottom) is a reference to the mechanic of the recent viral hit Suika Game, where players combine fruits pairwise to make larger fruits in 2048-like fashion. The 11 fruits in the game match the 11 fruits in this puzzle. (The English web version of the game refers to the persimmon as an orange, but the canonical fruit is a persimmon.)

Following the game’s mechanic, we combine the parenthesized pairs of fruits to get different fruits and a new system of 11 equations:

grape + strawberry - 14 = grape

strawberry + 9 = dekopon

31 - grape = peach

33 - grape = strawberry

37 - apple = pear

12 ÷ peach = cherry

watermelon = persimmon

252 ÷ strawberry = apple

strawberry + cherry - 9 = melon

dekopon - 18 = watermelon

21 - peach = pineapple

This system of equations also resolves nicely to positive integer values, again aided by first identifying the strawberry’s value. The new values are:

FruitValueLetter
cherry1A
strawberry14N
grape19S
dekopon23W
persimmon5E
apple18R
pear19S
peach12L
pineapple9I
melon6F
watermelon5E

When read in the canonical ordering of the fruits in Suika Game from smallest to largest, the values-converted-to-letters match the (6'1 4) enumeration to spell ANSWER’S LIFE.

Authors' Notes

Bryce: I have never made a watermelon.

Dan:

picture of Suica game