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2023

IB Math Remainder Theoremoriginal ↗
21 Jun 2023
Finding other pair of roots when one complex root of a quartic equation is givenoriginal ↗
21 Jun 2023
Forming a quadratic equation with roots from other quadratic equationoriginal ↗
21 Jun 2023
Max area of rectangle inscribed between parabolasoriginal ↗
21 Jun 2023
Max Area of a Trapezium inside a semicircle with one side as diameter (Calculus Optimization)original ↗
21 Jun 2023
Math IB HL Minimum Tangent lengthoriginal ↗
21 Jun 2023
Vectors on an Isometric gridoriginal ↗
20 Jun 2023
Vectors and Ratiosoriginal ↗
20 Jun 2023
Finding position Vectororiginal ↗
20 Jun 2023
For how many values of k is 12^12 the lcm of 6^6 , 8^8 and koriginal ↗
19 Jun 2023
Smallest positive integer greater than 1 which leaves a remainder of 1 when divisible by any number from 2 to 9original ↗
19 Jun 2023
Pascal Contest 2021 Question 17 (Length of the paths)original ↗
19 Jun 2023
Pascal Contest 2021 Question 14 (Robot moving in a grid)original ↗
19 Jun 2023
Pascal Contest 2021 Question 15 (Nate’s grid)original ↗
18 Jun 2023
2021 AMC 10 B Problem 5original ↗
18 Jun 2023
https://sumantmath.wordpress.com/2023/06/17/14098/original ↗
17 Jun 2023
20th of January on what day ?original ↗
17 Jun 2023
Cutting a L shaped trimino into 4 self similar trinimosoriginal ↗
16 Jun 2023
How many boxes are crossed by a diagonal in a rectangular table made up of squares ?original ↗
16 Jun 2023
Estimating Z(alpha/2) for 90%, 95% and 99% Confidence Intervaloriginal ↗
14 Jun 2023
Estimating population mean from sample mean (Confidence Interval)original ↗
14 Jun 2023
Breaking down (Coffee and Ice cream machines) Poisson Distribution (Sum two Random Variables)original ↗
13 Jun 2023
Critical Region, Acceptable Region and Critical Value in a Normal Distribution with 5% leveloriginal ↗
13 Jun 2023
Probability of mean of samples less than a numberoriginal ↗
13 Jun 2023
Expectation and Variance of Linear Combination of Random Variablesoriginal ↗
13 Jun 2023
Intuition behind Type 1 and Type 2 errorsoriginal ↗
12 Jun 2023
Z test for the mean when variance of population is knownoriginal ↗
12 Jun 2023
Type 1 and Type 2 errors in statistics (Hypothesis Testing)original ↗
12 Jun 2023
Divisibility by 1001original ↗
11 Jun 2023
Compute the value of ones digitoriginal ↗
10 Jun 2023
Smallest possible value needed to make a given number a square numberoriginal ↗
10 Jun 2023
Pascal Contest 2019 Question 17 (Striped,Spotted,Wings,Horns)original ↗
9 Jun 2023
Pascal Contest 2019 Question 21 (Unit digit of 5^2019-3^2019)original ↗
8 Jun 2023
How to come up with divisibility tests of 4, 8 and beyond ?original ↗
5 Jun 2023
IB Math HL Quartic Equation (sum and product of roots)original ↗
4 Jun 2023
If n^3+3 is odd, then n is evenoriginal ↗
4 Jun 2023
If the sum of the digits of a four digit number is divisible by 3, then the four-digit number is also divisible by 3 (Direct Proof)original ↗
4 Jun 2023
Sum, Difference and Product of Random Variablesoriginal ↗
3 Jun 2023
Linear combination of independent random variablesoriginal ↗
2 Jun 2023
Expectation and Variance of Independent Random Variablesoriginal ↗
1 Jun 2023
Why Variance formula is E(x^2)-(E(x))^2 ?original ↗
1 Jun 2023
Pascal Contest 2022 Question 10 (Back to same arrangement )original ↗
31 May 2023
Pascal Contest 2022 Question 10 (Number of Paths)original ↗
31 May 2023
Geometric Probability and Expectationoriginal ↗
30 May 2023
IB SL: Conditional Probability and Venn Diagramoriginal ↗
29 May 2023
IB SL Geometric Probability (Serena and her dart game)original ↗
29 May 2023
IB SL Probability (Biased Dice)original ↗
29 May 2023
IB HL Trigonometry (Double Angle Identities)original ↗
29 May 2023
Gauss Contest 2022, Problem 23 (Encoded Message)original ↗
29 May 2023
Gauss Contest 2020: Problem 18 (Two Isosceles Triangles)original ↗
29 May 2023
Guass Contest 2022 Problem 12: Calendar Problem (The 3rd Wednesday)original ↗
28 May 2023
Using Ordinary Generating Functions to find sum of squares of first n termsoriginal ↗
27 May 2023
How many four digit numbers have one odd and three even digits ?original ↗
27 May 2023
Number of Isosceles triangle are there in a regular decagon ?original ↗
27 May 2023
Gauss Contest 2021, Question 24 (GCD and LCM)original ↗
26 May 2023
Gauss Contest 2021, Question 19 (Sum using digits 1 to 9)original ↗
26 May 2023
Gauss Contest 2022, Question 17 (P+Q+R)original ↗
26 May 2023
Stars and bars VS Ordinary Generating Functionsoriginal ↗
25 May 2023
How to think about Plane Equation ?original ↗
24 May 2023
Math 1031 May 2019 Q1 b Durham University (Mathematical Induction)original ↗
24 May 2023
Recursive formula for a binary sequence that contains at least two zerosoriginal ↗
24 May 2023
IB HL Trig Transformation of Functionoriginal ↗
24 May 2023
FSJM – Q17 SEMI-FINAL- 18 MARCH 2022original ↗
24 May 2023
Multiplying by 999999999original ↗
23 May 2023
Gauss Contest 2021 Question 21original ↗
22 May 2023
Bean Bags and Students (Pigeon Hole)original ↗
22 May 2023
Locks and Keys (Pigeon Hole)original ↗
22 May 2023
Math 1031 May 2022 Q2a (iii) Durham University (Binomial Identity)original ↗
22 May 2023
Math 1031 May 2020 Q3.2 Durham University (Ordinary Generating Function)original ↗
21 May 2023
Math 1031 May 2022 Q4.2 Durham University (Recurrence Relation)original ↗
20 May 2023
Math 1031 Durham University (Q 108 Generating Functions)original ↗
19 May 2023
Number of subsets of a set of first n numbers where no two consecutive numbers are in a subetoriginal ↗
19 May 2023
Derangement of the word SMALL (Inclusion Exclusion and direct method)original ↗
18 May 2023
How to obtain Generating Function of Fibonacci Sequence ?original ↗
17 May 2023
Math 1031 May 2020 Q4.2 Durham University (Assorted Sweets)original ↗
16 May 2023
Math 1031 May 2020 Q1 Durham University (Arrangement of CONTRIBUTION)original ↗
16 May 2023
Math 1031 May 2021 Q3 Durham University (Close formula for Recursive Relation)original ↗
15 May 2023
FSJM 37, Q11 The Pencil Rack (37th Math and Logic Games,May 2023)original ↗
14 May 2023
Math 1031 May 2022 Q3 Durham Universityoriginal ↗
13 May 2023
FSJM 30, Q11 The ferry (I love Maths)(30th Math and Logic Games, 2016)original ↗
13 May 2023
FSJM 30, Q9 Semi Magic Square (30th Math and Logic Games, 2016)original ↗
13 May 2023
Combinatorial proof of the identity nCr(2n,n)original ↗
12 May 2023
Prove the binomial Identity nCr(2n,2)=2*nCr(n,2)+n²original ↗
12 May 2023
FSJM 31 Q9 Telephone and Great GrandMother’s Birthday (31st Math and Logic Games, 2017)original ↗
12 May 2023
FSJM 33 Q4 The Band of six (33rd Math and Logic Games, 2019)original ↗
12 May 2023
Logistic Differential equation 1original ↗
12 May 2023
FSJM 33 Q10 Magic Square (33rd Math and Logic Games, 2019)original ↗
12 May 2023
FSJM 34 Q6 Fair Shares (34th Math and Logic Games)original ↗
12 May 2023
FSJM 34 Q6 Stacks of dice (34th Math and Logic Games)original ↗
12 May 2023
FSJM 33 Q8 A Long Series (33rd Math and Logic Games)original ↗
12 May 2023
FSJM 33 Q7 The Balls (33rd Math and Logic Games)original ↗
12 May 2023
FSJM 33 Q2 The Map of Poldavia (33rd Math and Logic Games)original ↗
12 May 2023
FSJM 31 Q8 I have you given sweets (31st Math and Logic Games)original ↗
12 May 2023
FSJM 31 Q11 Black Square (31st Math and Logic Games)original ↗
12 May 2023
FSJM 31 Q1 Grandfather loses (31st Math and Logic Games)original ↗
12 May 2023
FSJM Q1 Gene’s Jeans (33rd Math and Logic Games)original ↗
7 May 2023
FSJM Q1 Code Breaker (33rd Math and Logic Games)original ↗
7 May 2023
IB Math: Good question on Probabilityoriginal ↗
7 May 2023
Normal Distribution when both mean and standard deviation are missing (University of Bristol Q7 review)original ↗
7 May 2023
IB Math: Dealing with ambiguous triangle caseoriginal ↗
7 May 2023
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