Question

4 You are given three digits 7, 2, and 9.
a How many three-digit numbers can be formed without repeating any of them?
b How many of the numbers formed in a are divisible by 3? Why?
e How many of the numbers formed in a are divisible by 9? Why?
d How many of the numbers formed in a are divisible by 6? Why?
5 72a384 is a number in which one of the digit is "a". If the number is exactly divisible by 9, what is
the numerical value of 'a'?
6 46a7b2 is a number of 6 digits in which a and b are two digits. This number is divisible by 9. Find
the least value of a + b. Also state the maximum value of a +b.
7 There are 150 students waiting for a boat to cross a river. The students have to be divided into equal
groups to get into different boats. In how many ways can you group the students such that each
group has more than 5 students and less than 50 students?
New Enjoying Mathematics 6​

Answer 1

Answer:

This is a tough question

Answer 2

Answer:

hmm it's too long ...,....