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Byju's Answer

Standard VIII

Mathematics

Fractions and Ratios

Three numbers...

Question

Three numbers are in the ratio 1 : 2 : 3 and their H.C.F. is 6. The numbers are ______.

A) 4, 8, 12 B) 5, 10, 15
C) 10, 20, 30 D) 6, 12, 18

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Solution

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Similar questions

Q. If

A = {3, 6, 9, 12, 15, 18, 21}, B = {4, 8, 12, 16, 20},

C = {2, 4, 6, 8, 10, 12, 14, 16}, D = {5, 10, 15, 20};

find
(i)

A - B

(ii)

A - C

(iii)

A - D

(iv)

B - A

(v)

C - A

(vi)

D - A

(vii)

B - C

(viii)

B - D

(ix)

C - B

(x)

D - B

(xi)

C - D

(xii)

D - C

Q. A survey was conducted by a group of students as a part of their environment awareness programme, in which they collected the following data regarding the number of plants in

20

houses in a locality.Find the mean number of plants per house.

Number of plants	$0 - 2$	$2 - 4$	$4 - 6$	$6 - 8$	$8 - 10$	$10 - 12$	$12 - 14$
Number of houses	$1$	$2$	$1$	$5$	$6$	$2$	$3$

Which method did you use for finding the mean, and why?

If A = {3, 6, 9, 12, 15, 18, 21}
B = {2, 4, 6, 8, 10, 12, 14, 16}
C = {5, 10, 15, 20}

$\begin{matrix} A & B 1. B - C & A . {5, 10, 20} 2. A - C & B . {3, 9, 15, 21} 3. C - (A - B) & C . {3, 6, 9, 12, 18, 21} 4. C \cap (A - B) & D . {15} E . {2, 4, 6, 8, 12, 14, 16} \end{matrix}$

A line AB is divided internally at P(4, -8) in the ratio 2 : 3 & at Q(0, -10) in the ratio 3 : 2. Find A & B.