Question

How many 3 digit numbers are not divisible by 8. Solve by AP method.
whoever does this will receive brainliest​

Answer 1

Answer:

answer is 788

Step-by-step explanation:

the 3 digit numbers divisible by 8

104,112,120______992

a=104 an= 992 d=8

an=a+(n-1)d

992=104+(n-1)8

992=104+8n-8

992=96+8n

992-96=8n

896=8n

n=896/8

n=112

total 3 digit numbers

100,101,102_ _ _ _ _999

a=100 an=999 d=1

an=a+(n-1)d

999=100+(n-1)1

999=100+n-1

999=99+n

n=999-99

n=900

the 3 digit numbers which are not divisible by 8=

=Total 3 digit numbers - total 3 digit numbers divisible by 8

=900-112

=788