Question

(a) 4/9 x3 (b) 3/20x4 Q3. Add. (a) 5.8+3.24 (b) 12.56+ 2.9 +3.0 (c) 13.24+18 56 Q4 Subtract (a) 5.8 - 3.72 (b) 8.3-2.45 (c) 16.40-10.30 Q5 Find the LCM. (a) 32, 48 (b) 120, 150,180 (c) 12,24, 48 SECTION-C 1 Reduce in lowest term. (a)24/36 (b) 60/72 Q2 Divide (a) Divide 1.719 by 3 (b) 13.32by 4 Q3Multiply (a) 4.7by4 (b) 1.764 byo. 8 Q4 Lcm and hcf of two numbers are 480 and 160 respectively if one number is 96 find the other number Q5 The cost of one kg apple is Rs 43.60. Find the cost of 8 kg apples. . 8 . Section -D​

Answer 1

Answer:

Question



The Least Common Multiple(LCM) of 0.12,9.60 and 0.60 is?

A

9.60

B

0.12

C

0.6

D

None of these

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Solution



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Correct option is

A

9.60

Steps to solve H.C.F. and L.C.M. of decimals:

i) Convert each of the decimals to like decimals.

(ii)Remove the decimal point and find the highest common factor and least common multiple as usual.}

(iii) In the answer (highest common factor /least common multiple), put the decimal point as there are a number of decimal places in the like decimals

we have to find LCM of 0.12,9.60, and 0.60

converting decimals to like decimals

⇒12,960,60

prime factorization of 12⇒22×3

prime factorization of 960 ⇒26×3×5

prime factorization of 60⇒22×3×5

LCM(12,960,60) =26×3×5=960

B(iii) In the answer (highest common factor /least common multiple), put the decimal point as there are a numbery putting the decimal point as there are a number of decimal places in the like decimals. we get

LCM(0.12,9.60,0.60) is 9.60