Find the HCF of the following by Prime factorisation,
a) 72,54, 27
b) 24, 16, 36 do this please with full solutions

here

72, 54, 27 are divisible by 3, to check divisibility by 3 we have to add the digits.

dividing all three digits by 3 we get :

3 x 24 =  72

3 x 18 = 54

3 x 9 = 27

now we have 24, 18, 9

check divisibility by 2, but no, it is not possible. 2 is not divisible by 5 so we take 3, yes three is divisible

24, 18, 9

3 x 8 = 24

3 x 6 = 18

3 x 3 = 9

so now we have 8,6,3

this is neither divisible by 2 or 3 so now we multiply 3 x 3

= 9

second answer is 4  

9.55 degrees.

step-by-step explanation:

the given angle is

1 cycle is equal to 2π radians. so 4π will be equal to two cycles.

5.166667π-4π = 1.166667π

hence, this angle goes a little more than negative x axis.

1.166667π-π= 0.166667π

hence, the reference angle is 0.166667π radians.

1 radian = 57.2958 degrees

now, in degrees, this should be equals to 9.55 degrees.

it should be a.

hope it