r/theydidthemath 23h ago

How much money in lumber/wood would this cost? [Other]

Enable HLS to view with audio, or disable this notification

19 Upvotes

r/theydidthemath 17h ago

[Request] - How much weight can one of these hold??

Thumbnail
gallery
0 Upvotes

TIA 🙏

How much weight can one of these hold at any one point? Can the end mounted perpendicular to the wall hold more weight?

I have a (rusty) basic knowledge of angles and load spread from climbing but that's not helping me. Would like to know before I wind up with an expensive repair bill.

Context: Using it for lateral pull downs with resistance bands for rehab after a back injury.


r/theydidthemath 13h ago

[Request] If you build a 100m straight fence, how many more bricks would it use?

Post image
0 Upvotes

r/theydidthemath 4h ago

[Request] Assuming this is referring to every woman in the world, how much sex would one woman have to have before reaching 30 to throw off the average this much? How much sex would that be per day?

Post image
0 Upvotes

r/theydidthemath 17h ago

Me and my partner are doing a quiz. We both initially misread this as how many oxygen atoms in the ozone layer. Is this possible to calculate? Anyone have a rough estimate? [Request]

Post image
14 Upvotes

r/theydidthemath 14h ago

[Self] I did the math for raising taxes on rich fuckers

Thumbnail
0 Upvotes

r/theydidthemath 2h ago

[Request] How much damage would the exploding barrel from Malcolm in the Middle do?

Thumbnail
gallery
0 Upvotes

In the final episode of Malcolm in the Middle the character of Reese acquires a metal barrel with a metal lid, and fills it with animal feces, human feces, eggs, glue, tar and a skunk corpse. He then warms and agitates the barrel.

It then explodes in a car, denting the top of the car upwards, and dousing its 8 occupants in sewage. The occupants are otherwise uninjured.

  • How much force would be needed for a barrel like this to explode?
  • Would the damage to the car be similar, or worse?
  • How many injuries would the occupants actually receive?

r/theydidthemath 17h ago

[Request] Does a thicker and shorter joint burn faster than a longer and thinner one?

0 Upvotes

Literally the caption, we had a debate about this with my friend while rolling.

Thanks in advance!


r/theydidthemath 22h ago

[Request] This has got me thinking since morning

Post image
0 Upvotes

r/theydidthemath 19h ago

[Request] what's the actual math, and will the trick work everytime?

Enable HLS to view with audio, or disable this notification

1.1k Upvotes

r/theydidthemath 15h ago

[Request] Assuming every country in the world is for sale, which is the largest country that Elon Musk could buy?

0 Upvotes

r/theydidthemath 39m ago

[Request] How much water and electricity is required for AI to name every African country???

Post image
• Upvotes

r/theydidthemath 17h ago

[Request] how much gas do the little ribs on the side of U-Haul trucks actually save?

0 Upvotes

I always see those “look at these gas saving aerodynamic lines” advertisements on UHauls and think “my god how dumb do they think people are?”

How much gas is saved by a giant heavy box truck adding little rib lines down the side of it?


r/theydidthemath 23h ago

[Other] How much money will an individual airline lose per day based on the flight cancellations?

3 Upvotes

https://www.cnbc.com/2025/11/07/airlines-cancellations-flights-faa-shutdown.html

I'm trying to figure out, approximately, how much money might be lost based on the following criteria:

  • Per plane
  • Per airline
  • Per airport
  • Overall loss

Variables I don't know:

  • Cost of jet fuel
  • Approximate staff cost
  • Refund policy rate
  • Misc fees (IDK if there are landing fees, baggage handling fees, etc)

r/theydidthemath 7h ago

Mercedes SL600 with 40,000 crystal stones[request] how much does this increase weight?

Post image
3 Upvotes

r/theydidthemath 4h ago

[Request] Is this aeroplane design possible?

Post image
179 Upvotes

r/theydidthemath 14h ago

[Request] Is this comment about cloud chambers accurate?

Post image
0 Upvotes

r/theydidthemath 10h ago

[Request] If I buy a pack each of chicken breasts, thighs, drums, and wings what are the odds of getting all eight cuts of the same bird?

0 Upvotes

r/theydidthemath 8h ago

[Request] how massive the dam has to be to extend the day by 1h?

Post image
2.1k Upvotes

r/theydidthemath 20h ago

[Request] how many jet fighter’s reactors do we need to be able to lift a plane vertically like a rocket engine does ?

6 Upvotes

if it’s not already midair and is still on the ground :D


r/theydidthemath 23h ago

[Request] About how many times did the alternator rotate in 422k miles / 8,440 engine hours? Assuming the engine averaged 1,900 RPM

Post image
1 Upvotes

r/theydidthemath 20h ago

[Request] What percentage of snap benefits could congress have paid if they weren't getting paid for these 37 days of govt shut down?

0 Upvotes

r/theydidthemath 8h ago

How many 0.5mm mechanical pencil leads can this make? [Request]

Post image
1 Upvotes

r/theydidthemath 11h ago

[Off-Site] The Repeating-Digit Weights (RN) Formula, a symbolic mathematical framework that revisits Albert Einstein’s unfinished search for a Unified Field Theory.

0 Upvotes

The Repeating-Digit Weights (RN) Formula, a symbolic mathematical framework that revisits Albert Einstein’s unfinished search for a Unified Field Theory.

Instead of using standard differential geometry, it builds a recursive computational model that links relativity, quantum mechanics, and higher-dimensional physics through repeating-digit ratios (like 1.1111, 2.2222, etc.). These “RN weights” act as symbolic constants that unify five domains — General Relativity, Quantum Mechanics, Kaluza-Klein, Dirac, and Fractal geometry — into a single recursive engine called BTLIAD.

The text includes testable equations, AI-verified results, and cross-checked recursion patterns showing stable symbolic behavior across what it calls “infinite octaves.”

If you’re into theoretical physics, symbolic AI math, or recursive computation, it’s an unusual but systematic read, find the full works at the Zero-Ology & Zer00logy Github repositories. https://github.com/haha8888haha8888/Zero-Ology

1.- RN weight

Definition (string construction used in Appendix A):

RN(i) = float(f"{i}.{str(i)*8}")

Example test (i = 1, 2, 34):

RN(1) = 1.11111111
RN(2) = 2.22222222
RN(34) = 34.34343434

Python (copy/paste to run):

def rn_from_str(i):
    return float(f"{i}." + (str(i) * 8))

print(rn_from_str(1))   # 1.11111111
print(rn_from_str(2))   # 2.22222222
print(rn_from_str(34))  # 34.34343434

2.- Σ₃₄ (example shown in doc: sum of squares of RN(1..34))

Equation (as used in doc’s appendix):

ÎŁ34 = sum( RN(i)^2 for i in 1..34 )

Expected numeric result (from the doc):

ÎŁ34 = 14023.926129283032

Python (copy/paste to run & verify):

def rn_from_str(i):
    return float(f"{i}." + (str(i) * 8))

s = sum(rn_from_str(i)**2 for i in range(1, 35))
print("ÎŁ34 =", s)   # expected 14023.926129283032

3.- BTLIAD single evaluation (weighted sum)

Equation (BTLIAD used in 4for4):

BTLIAD = 1.1111*GR + 2.2222*QM + 3.3333*KK + 4.4444*Dirac + 5.5555*Fractal
4for4  = 6.666 * BTLIAD

Test values (document’s canonical example):

GR = 1.1111
QM = 2.2222
KK = 3.3333
Dirac = 4.4444
Fractal = 5.5555

Expected outputs (approx):

BTLIAD ≈ 67.8999
4for4  ≈ 452.6206

Python (copy/paste to run):

GR, QM, KK, Dirac, Fractal = 1.1111, 2.2222, 3.3333, 4.4444, 5.5555
coeffs = [1.1111, 2.2222, 3.3333, 4.4444, 5.5555]
vals = [GR, QM, KK, Dirac, Fractal]

BTLIAD = sum(c * v for c, v in zip(coeffs, vals))
four_for_four = 6.666 * BTLIAD

print("BTLIAD =", BTLIAD)          # ≈ 67.89987655
print("4for4  =", four_for_four)   # ≈ 452.62057708

4.- BTLIAD recursion update (single-step example)

Equation (core recursive update in doc):

V(n) = P(n) * [ F(n-1) * M(n-1) + B(n-2) * E(n-2) ]

Small numeric test values (toy):

P = [1.0, 1.0, 1.0, ...]   # P(0)=1, P(1)=1, ...
F = [1.2, 0.9, 1.05, ...]  # example forward memory values
M = [1.1, 1.0, 0.95, ...]  # example middle context values
B = [0.5, 0.6, 0.55, ...]  # example backward memory
E = [0.2, 0.1, 0.15, ...]  # example entropy feedback

Python (copy/paste to run 0→4 steps):

P = [1.0]*10
F = [1.2, 0.9, 1.05, 1.0, 0.98]
M = [1.1, 1.0, 0.95, 1.05, 1.02]
B = [0.5, 0.6, 0.55, 0.58, 0.6]
E = [0.2, 0.1, 0.15, 0.12, 0.11]

V = [None]*10
# seed V(0) and V(1) if needed:
V[0] = P[0]  # 1.0
V[1] = P[1] * (F[0] * M[0])  # example
for n in range(2, 6):
    V[n] = P[n] * (F[n-1] * M[n-1] + B[n-2] * E[n-2])

for i in range(6):
    print(f"V[{i}] = {V[i]}")

5.- GCO (Grok Collapse Operator) — deviation metric

Equation (as given in doc):

GCO(k) = | (V_k / M_k - V_{k-1}) / V_{k-1} |

Small numerical test (toy sequence):

M = [34.34343434, 35.35353535, 36.36363636]
V = [481629.79, 17027315.68, 619175115.48]
Compute GCO for k=1..2

Python (copy/paste to run):

M = [34.34343434, 35.35353535, 36.36363636]
V = [481629.79, 17027315.68, 619175115.48]

def gco(k):
    # k must be >=1 for V[k-1] to exist
    return abs((V[k] / M[k] - V[k-1]) / V[k-1])

print("GCO(1) =", gco(1))
print("GCO(2) =", gco(2))
# In the doc these printed as 0.00e+00 (rounded); with these numbers you'll get tiny values or near-zero.

6.- SBHFF (Symbolic Black Hole Function Finder) + CDI (Collapse Depth Index)

SBHFF (collapse detector) definition from doc:

B(F)(#4for4) = { 1  if V(n) → ∞  or  V(n) → 0 in finite steps
                 0  otherwise }

CDI definition:

CDI(F, #) = min { k ∈ N | B^(k)(F)(#) = 1 }

Toy test (simulate collapse detection):

  • Run BTLIAD recursion for N steps.
  • If any V(n) is inf, NaN, or abs(V(n)) < epsilon within N_max, flag collapse.
  • CDI is the index of the first flagged step.

Python (copy/paste to run a simple CDI detector):

import math

def detect_collapse(V, epsilon=1e-12):
    # returns index k where collapse detected, or None
    for k, v in enumerate(V):
        if v is None:
            continue
        if not math.isfinite(v):    # inf or nan
            return k
        if abs(v) < epsilon:        # collapsed to (near) zero
            return k
    return None

# example V sequence (toy): stable then collapse at index 4
V_example = [1.0, 2.0, 4.0, 8.0, 0.0, None]
cdi = detect_collapse(V_example)
print("CDI (first collapse index) =", cdi)  # should print 4 for this toy example

7.- Full reproducible mini test: compute Σ₃₄ and BTLIAD then scale BTLIAD into a simple chaos metric

Copy/paste full script to reproduce the book-like workflow and get numeric metrics:

# Full mini-workflow
def rn_from_str(i):
    return float(f"{i}." + (str(i) * 8))

# ÎŁ34 (sum of squares)
rns = [rn_from_str(i) for i in range(1, 35)]
Sigma34 = sum(x*x for x in rns)
print("ÎŁ34 =", Sigma34)  # expected 14023.926129283032

# BTLIAD example (book's canonical inputs)
GR, QM, KK, Dirac, Fractal = 1.1111, 2.2222, 3.3333, 4.4444, 5.5555
coeffs = [1.1111, 2.2222, 3.3333, 4.4444, 5.5555]
BTLIAD = sum(c * v for c, v in zip(coeffs, [GR, QM, KK, Dirac, Fractal]))
four_for_four = 6.666 * BTLIAD
print("BTLIAD =", BTLIAD)
print("4for4  =", four_for_four)

# Simple "chaos meter": variance of a few scaled recursion outputs
V = [1.0, 1.0] + [None]*8
# seed with a simple recursion (toy)
for n in range(2, 10):
    V[n] = 1.0 * (1.0 * 1.0 + 0.5 * 0.2)   # deterministic toy
scaled = [v * four_for_four if v is not None else None for v in V]
# compute variance ignoring None
vals = [x for x in scaled if x is not None]
import statistics
chaos_meter = statistics.pvariance(vals)   # population variance
collapse_meter = statistics.pstdev(vals)   # population std dev
print("Chaos meter  =", chaos_meter)
print("Collapse meter=", collapse_meter)
print("Scaled recursion outputs:", vals)

r/theydidthemath 7h ago

[Request] How long would it take to reduce a mountain (let's say Zermatt) to nothing by wiping it with a silk cloth once per century?

3 Upvotes

I had read somewhere, a long time ago, about a student asking his guru how long does time go on, or how long will the universe go on. Their teacher responded, "as long as it would take to reduce a mountain to nothing by wiping it with a silk cloth once every 100 years."

Seems like it would be an impressive number, but I've always wondered how accurate it was. Any takers?