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2023

MYP Question on Bearings from Haese Q3a from Exercise 10B.2original ↗
14 Feb 2023
IB HL Differential Equation with substitutionoriginal ↗
14 Feb 2023
IB HL Sequence Series with Infinite Sumoriginal ↗
14 Feb 2023
Calculating Expectation and Standard deviation of a uniform distributionoriginal ↗
13 Feb 2023
IB HL Convergence of Geometric Seriesoriginal ↗
12 Feb 2023
Why flow from source to sink is equal in network flows ?original ↗
11 Feb 2023
Universiteit Van Amsterdam 2017 Question 5 on Probability approximating Binomial with Poisson Distributionoriginal ↗
11 Feb 2023
Universiteit Van Amsterdam 2018 Question 4 on Probability using Poisson distributionoriginal ↗
11 Feb 2023
Ford Fulkerson (Quick Example from Kleinberg Tardos)original ↗
11 Feb 2023
Applying Ford Fulkerson Algorithmoriginal ↗
10 Feb 2023
Venn diagram question on Probabilityoriginal ↗
9 Feb 2023
Prove P(A\B)original ↗
9 Feb 2023
Many ways to parametrize Parabolaoriginal ↗
9 Feb 2023
Thinking of why complement of a disconnected graph is connectedoriginal ↗
8 Feb 2023
Apples in the basketoriginal ↗
5 Feb 2023
Magic Square Problemoriginal ↗
5 Feb 2023
2 Stamps problemoriginal ↗
5 Feb 2023
A fun problem on Tetris piecesoriginal ↗
5 Feb 2023
Conditional Independenceoriginal ↗
2 Feb 2023
Rethinking MISSISSIPPI Problemoriginal ↗
2 Feb 2023
Classic problems in Probabilityoriginal ↗
2 Feb 2023
Leibniz’s Mistakeoriginal ↗
2 Feb 2023
Prosecutor’s fallacyoriginal ↗
31 Jan 2023
Universiteit Van Amsterdam 2016 Question 2 on Probability using inclusion exclusion principle on two setsoriginal ↗
31 Jan 2023
Universiteit Van Amsterdam 2015 Question 4 on Probability of first 25 numbers appearing in certain orderoriginal ↗
31 Jan 2023
Universiteit Van Amsterdam 2015 Question 2 on proving independence of eventsoriginal ↗
31 Jan 2023
Universiteit Van Amsterdam 2018 Question 1 on Permutation of repeated lettersoriginal ↗
31 Jan 2023
IB SL Kinematics Practiceoriginal ↗
28 Jan 2023
IB Math SL 2021 Question 7 Paper 1 (Calculus)original ↗
28 Jan 2023
IB Math SL 2021 Question 8 Paper 1 (Calculus)original ↗
28 Jan 2023
AP Calculus Length of Cardoidoriginal ↗
28 Jan 2023
Angle subtended by a triangle opposite to triangle inscribed equilateral triangle in a squareoriginal ↗
27 Jan 2023
Matrix multiplication MS&E 111, MS&E 211 Problem 2original ↗
27 Jan 2023
Middle school problems on scaling in geometryoriginal ↗
27 Jan 2023
Matrix multiplication MS&E 111, MS&E 211 Problem 1original ↗
27 Jan 2023
IB Math HL Complex Numbersoriginal ↗
27 Jan 2023
Thinking Matrix Multiplicationoriginal ↗
27 Jan 2023
AP Calculus: Area between curves r=-6cos(x) and r=2-2cos(x)original ↗
26 Jan 2023
IB SL Kinematics When Velocity graph is givenoriginal ↗
25 Jan 2023
AP Calculus: Area of a single petal of function r=2cos(3x)original ↗
24 Jan 2023
IB HL Complex Numbers Modulus and Argumentoriginal ↗
23 Jan 2023
IB HL Complex Number Argumentoriginal ↗
23 Jan 2023
IB HL Complex Number (Region)original ↗
23 Jan 2023
Prof Bernardo’s 2023 problemoriginal ↗
22 Jan 2023
IB SL Question on transformation and scaling of coordinateoriginal ↗
21 Jan 2023
Math SL: Finding negative index terms in geometric sequencesoriginal ↗
21 Jan 2023
IB HL A common question in Vectors Chapteroriginal ↗
20 Jan 2023
IB SL A biased four sided die with faces labelled 1,2,3 and 4original ↗
19 Jan 2023
IB SL A scientist conducted a nine week experimentoriginal ↗
19 Jan 2023
IB SL A Particle moves in a straight lineoriginal ↗
19 Jan 2023
IB SL Farmer placing postsoriginal ↗
19 Jan 2023
IB SL Questions covering Trig, Binomial, Probability, Calculus, Quadraticoriginal ↗
18 Jan 2023
Proof in Logic ~(P and ~q) and p implies q or roriginal ↗
18 Jan 2023
IB SL Questions (Trigonometry, Binomial, Normal Distribution, Logarithms, Functions)original ↗
18 Jan 2023
Implication, Converse, Inverse, Contrapositiveoriginal ↗
17 Jan 2023
Why p->q and q->r -> p->r ? (Transitivity in Predicate Calculus)original ↗
17 Jan 2023
A little exponential puzzleoriginal ↗
9 Jan 2023
AP Calculus Derivative of Parametric Functionoriginal ↗
8 Jan 2023
AP Calculus Definite Integral Evaluation Using Graphoriginal ↗
8 Jan 2023
AP Calculus ARC Length Questionsoriginal ↗
8 Jan 2023
Two Related Rates Problem AP Calculusoriginal ↗
8 Jan 2023
Linear Congruence 6x=4 mod 10original ↗
6 Jan 2023
2x+3y is multiple of 17 implies 9x+5y is also a multiple of 17original ↗
6 Jan 2023
Yearning for the impossible by Stillwelloriginal ↗
3 Jan 2023
Why Euclidean Algorithm workoriginal ↗
3 Jan 2023
Solving an AOPS fraction problemoriginal ↗
2 Jan 2023
What is the max value of n when n+10 divides n^3+100 ?original ↗
1 Jan 2023

2022

Number Theoryoriginal ↗
31 Dec 2022
Last two digits of 99^(2025) and 99^(2024)original ↗
31 Dec 2022
IB Leaking Water Tank Problemoriginal ↗
31 Dec 2022
IB MacLaurin Seriesoriginal ↗
31 Dec 2022
Inscribing Circumscribing Polygons to estimate Pi (IB Paper 3)original ↗
31 Dec 2022
Water flowing out of Cylinderoriginal ↗
31 Dec 2022
IB SL Questions on Sequence Series, Binomial Theorem Practiceoriginal ↗
30 Dec 2022
Evaporating water from a hemispherical bowloriginal ↗
30 Dec 2022
Example: Distance between point and plane and reflection of a point across planeoriginal ↗
27 Dec 2022
Calculating lambda for intersection between line and planeoriginal ↗
27 Dec 2022
Accuracy of approximation of sin(x) (Lagrange form of the remainder)original ↗
22 Dec 2022
AP Calculus: Derivative of Inverse (Proof and practice questions)original ↗
22 Dec 2022
Power series of 1/x and ln(x) centered at 1original ↗
22 Dec 2022
AP Calculus: Interval of convergenceoriginal ↗
22 Dec 2022
IB HL Logarithms Practiceoriginal ↗
21 Dec 2022
IB SL Paper 1 Practiceoriginal ↗
20 Dec 2022
IB Probabilityoriginal ↗
20 Dec 2022
IB Probability, Independent and not mutually exclusive events questionoriginal ↗
20 Dec 2022
Mod m is an equivalence relationoriginal ↗
20 Dec 2022
Probability IB HL (Baye’s Theorem application)original ↗
20 Dec 2022
Taylor Polynomial Approximationoriginal ↗
20 Dec 2022
Distance between point and a plane (direct formula)original ↗
20 Dec 2022
What is the smallest positive integer whose digits have a product 2700 ?original ↗
18 Dec 2022
Bags of Marblesoriginal ↗
15 Dec 2022
6174: Kaprekar’s constantoriginal ↗
15 Dec 2022
Mary and Lucy’s Coinoriginal ↗
15 Dec 2022
The Bogota Puzzles by Bernardo Recamanoriginal ↗
14 Dec 2022
Los Numeros: Una historia para contaroriginal ↗
14 Dec 2022
A Pyramidoriginal ↗
14 Dec 2022
What is the number ?original ↗
13 Dec 2022
7th Fibonacci number is 11 times sum of first 10 Fibonnaci numberoriginal ↗
13 Dec 2022
Cards appear in orderoriginal ↗
13 Dec 2022
A problem on square number and products of factorialoriginal ↗
12 Dec 2022
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