After applying invertendo to $1 : 2 :: 8 : 9$ we get:

2 : 1 :: 9 : 8

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1 : 8 :: 2 : 9

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8 : 9 :: 1 : 2

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1 : 9 :: 8 : 2

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Solution

The correct option is B $2 : 1 :: 9 : 8$
If $a : b :: c : d$ then $b : a :: d : c$ is invertendo property of ratios
We have $1 : 2 :: 8 : 9$
After applying invertendo we get
$2 : 1 :: 9 : 8$
Option A is correct

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Similar questions

Q. In the following series how many times 7, 8, 9 appear together When 7 being in the middle?
7 2 8 7 9 2 1 7 8 9 1 6 7 4 2 1 7 9 7 8 2 8 9 7 2

Q. Study the following number line and answer the questions that follow.
2 5 9 1 7 2 5 1 9 7 3 9 5 2 4 6 8 1 9 7 5 2 7 3 1 9 7 8 5 2 6 5 4 1 9 7 8 2 0 1 0 9 7 8 5 1 9 7 3 5 1 6 9 7 2 1 7 3 7 9 5 1

How many times is number 5 followed by 1 or 2, but not preceded by 8 ?

Q. Which is the greatest number amongst

2^{1 / 2}, 3^{1 / 3}, 8^{1 / 8} a n d 9^{1 / 9}

Q. (1) 5, 3, 2, 9 (2) 2, 4, 3, 9
(3) 1, 4, 3, 8 (4) 3, 2, 3, 8

Evaluate :

$(i) (- 5)^{\circ} (i i) 8^{\circ} + 4^{\circ} + 2^{\circ} (i i i) (8 + 4 + 2)^{\circ} (i v) 4 x^{\circ} (v) (4 x)^{\circ} (v i) [(10^{3})^{\circ}]^{5} (v i i) (7 x^{\circ})^{2} (v i i i) 9^{\circ} + 9^{- 1} - 9^{- 2} + 9^{\frac{1}{2}} - 9^{- \frac{1}{2}}$

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After applying invertendo to 1:2::8:9 we get:

The correct option is B 2:1::9:8If a:b::c:d then b:a::d:c is invertendo property of ratiosWe have 1:2::8:9After applying invertendo we get2:1::9:8Option A is correct

After applying invertendo to $1 : 2 :: 8 : 9$ we get:

The correct option is B $2 : 1 :: 9 : 8$
If $a : b :: c : d$ then $b : a :: d : c$ is invertendo property of ratios
We have $1 : 2 :: 8 : 9$
After applying invertendo we get
$2 : 1 :: 9 : 8$
Option A is correct