Combinatorics
Math ⇒ Statistics and Probability
Combinatorics starts at 9 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Combinatorics.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 9
How many 3-digit numbers can be formed using the digits 1, 2, 3, 4, 5 if no digit is repeated?
How many different ways can you arrange the letters in the word 'MATH'?
How many ways can 3 students stand in a line?
How many ways can 4 people be seated in a row of 4 chairs?
How many ways can you arrange the letters in the word 'BANANA'?
How many ways can you arrange the letters in the word 'LEVEL'?
How many ways can you arrange the letters in the word 'SUCCESS'?
How many ways can you select 2 students from a class of 10 to be class representatives?
If a committee of 3 is to be formed from 7 people, how many different committees are possible?
If a password consists of 2 letters followed by 2 digits, how many different passwords can be formed if repetition is allowed?
If you have 10 different books, how many ways can you select 4 books?
If you have 3 shirts and 4 pants, how many different shirt and pant combinations can you make?
If you have 4 different keys, how many ways can you arrange them on a keychain (circular arrangement)?
If you have 5 different colored marbles, how many ways can you select 3 marbles?
If you have 6 different colored balls, how many ways can you select 2 balls?
If you have 8 books and want to select 3 to take on a trip, how many different selections are possible?
What is the difference between a permutation and a combination?
What is the fundamental principle of counting?
What is the value of 5! (5 factorial)?
