Rich Tasks 69: Convince Me That...

Problem 133: How many 5s?

How many 5s?



source: Jonathan Hall

Problem 132: Simple Substitution

Find the value of f, if :

Problem 131: Quarter final combinations

Four English teams have progressed to the Champion's League quarter-finals. What is the probability of an all-English tie?















Hint 1
Hint 2
Hint 3

Problem 130: Dividing 3 units into 4

via Matematik Dunyasi

Rich Tasks 68: 2020

2020

Number 2020 - Facts about the integer

Problem 129: Congruent rectangles

Three Congruent Triangles. What is the angle?

source: Catriona Shearer

Rich tasks 67: Hospitals and Ambulances

Rich Tasks 66: How many ways to fix?

In how many different ways can you fix this? You are allowed to use one extra matchstick and you can do 1 move at most.






Some solutions...

11 in base 2 equals to 3

Can there be more solutions?

Rich Tasks 65: What Mathematics Do You See In This Picture?

Math Pics 17: Euler Diagrams

 

Resource, Resource2

Rich Tasks 64: Introduction to Logs

Problem 128: Function in the function

Rich Tasks 63: Radical Activity 2

Rich Tasks 62: Radical Activity

 

Problem 128: Arithmetic Puzzle

Problem 127: Decimals and Number Bases