Question

please answer me 5th 6th and 7th

Answer 1

5th

it can be done by using cyclicity and the cyclicity of 8 is 4 that comprises of 8,4,2 and 6

so it will never end with 0

6th

co prime then hcf will be 1

7th

hcf of 48 and 80 is 16

Answer 2

Answer:

(5)

For a number to end with the digit 0 it's prime factorization should have 2 and 5 as a common factor.

here 8^n = (2*4)^n doesn't have 5 in its prime factorization.

Therefore 8^n cannot end with the digit 0.

(6)

tep-by-step explanation:

Given : p and q are two co-prime numbers

To find : Their HCF and LCM

Solution :

Since, p and q are two co-prime numbers

Co-primes means only common factor is 1.

HCF is the highest common factor.

So, HCF(p,q)=1

To find LCM, we know that

Product of two numbers = HCF × LCM

p × q = 1 × LCM

(7)

HCF of 48 & 80= d

48= 2×2×2×2×3

80= 2×2×2×2×5

So, HCF of 48 & 80= 2⁴=16

Hence, d=16

HOPE IT WILL HELP YOU❤☺