Question

Find the H.C.F of 3.9, 6.6, 8.22

• A. 3
• B. 0.3
• C. 0.06
• D. 1.2

Answer 1

The correct option is C 0.06

Find H.C.F of 3, 9, 6 , 6, 8 ,22

$\to$ converting each of following decimals

into like decimal we get,

$3.90,6.60$ and $8.22$

$\to$ Now, expressing each of the number without

the decimals as the product of primes

$390=2\times 3\times 5\times 13=2\times 3\times 5\times 13$

$660=2\times 2\times 3\times 5\times 11=2^2\times 3\times 5\times 11$

$822=2\times 3\times 137=2\times 3\times 137$

Now, H.C.F of $390,660,822=2\times 3=6$

Therefore, the H.C.F of 390 , 66 and 8.22 = 0.06

$(\because$ taking 2 decimal places)

$\to$ So, Ans is 0.06.