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Maths QUESTION #4551

Question 5121

If a price increases from Rs.$80$ to Rs.$100$, what is the percent increase?

$20\%$
$25\%$✔️
$80\%$
$125\%$

Correct Answer Logic:

Percent increase = $\frac{100-80}{80} \times 100\% = \frac{20}{80} \times 100\% = 25\%$

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Pharmacokinetics and Pharmacodynamics QUESTION #3830

Question 5122

To achieve a chlorine concentration of $1.5$ ppm in a $6000$ L drenching facility, how much chlorinated lime ($30\%\ \text{w/w}$ available chlorine) is needed?

$3$ g
$27$ g
$30$ g✔️
$270$ g

Correct Answer Logic:

$1.5\ \text{ppm} = 1.5\ \text{mg/L}$. For $6000$ L: $1.5 \times 6000 = 9000\ \text{mg} = 9\ \text{g}$ chlorine. Since lime is $30\%\ \text{w/w}$: $\dfrac{9}{0.30} = 30\ \text{g}$.

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Maths QUESTION #7653

Question 5123

If the sum and product of the roots of a quadratic equation are 55 and 66 respectively, which of the following represents the correct quadratic equation?

$x^2 - 55x + 66 = 0$✔️
$x^2 + 55x - 66 = 0$
$x^2 - 55x - 66 = 0$
None of these

Correct Answer Logic:

For a quadratic equation $x^2 - Sx + P = 0$, where S is the sum of roots and P is the product of roots. Given: sum = 55 and product = 66. Therefore, the equation is $x^2 - 55x + 66 = 0$. This follows from Vieta's formulas.

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General Knowledge QUESTION #11522

Question 5124

Who invented the punch card system for mechanical data processing?

Powers
Pascal
Herman Hollerith✔️
Jacquard

Correct Answer Logic:

Herman Hollerith invented the punched card tabulating machine in 1890 for the US Census. His company later became part of IBM. Joseph Marie Jacquard earlier used punched cards to control looms (1804), but Hollerith's adaptation for data processing is the direct precursor to modern computing punch card systems.

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MBBS QUESTION #10276

Question 5125

The knee-jerk (patellar tendon) reflex, used clinically to assess the L3-L4 spinal segments, is a classic example of which type of reflex arc?

A monosynaptic stretch reflex✔️
A polysynaptic flexor withdrawal reflex
The inverse (Golgi tendon organ) reflex only
An autonomic visceral reflex

Correct Answer Logic:

The patellar reflex is the prototypical monosynaptic stretch reflex: muscle spindle afferents from the quadriceps synapse directly onto alpha motor neurons supplying the same muscle, producing rapid reflex contraction — used clinically to localize spinal segmental level and assess for upper vs. lower motor neuron pathology.

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English QUESTION #8460

Question 5126

Profane means:

Unholy✔️
pretend
abuse
alarming

Correct Answer Logic:

Profane means irreverent or unholy.

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English QUESTION #500

Question 5127

This will have a bad impact to the economy.

This will have a bad impact to the economy.
This will have a bad impact on the economy.✔️
This will have a bad impact at the economy.
This will have a bad impact over the economy.

Correct Answer Logic:

'Impact on' is correct

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Math Physics Chemistry Biology QUESTION #7734

Question 5128

Antibiotics are effective against which of the following pathogens?

Herpes simplex
Polio
Salmonella typhi✔️
None of the above

Correct Answer Logic:

Antibiotics target bacterial structures/processes (cell wall, protein synthesis). Salmonella typhi (bacterium) causes typhoid; antibiotics work. Herpes (virus) and polio (virus) require antiviral drugs.

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Nursing QUESTION #9287

Question 5129

The Rule of Nines is used in burn assessment. A patient has burns covering the entire right arm and anterior trunk. What percentage of TBSA (Total Body Surface Area) is burned?

27%
✔️
36%
18%
45%

Correct Answer Logic:

The Rule of Nines for adult burn assessment:

Body Region	TBSA %
Head and neck	9%
Each upper limb (arm)	9%
Anterior trunk	18%
Posterior trunk	18%
Each lower limb (leg)	18%
Perineum/genitalia	1%
Total	100%

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Biology Zoology Botany QUESTION #10819

Question 5130

Madreporite — the sieve plate used for water entry into the water vascular system — is present in:

Ascaris
Sea star✔️
Hydra
House fly

Correct Answer Logic:

The madreporite is a porous, calcareous sieve plate on the aboral surface of sea stars (Asteroidea) and other echinoderms. It serves as the entry point for seawater into the water vascular system — the hydraulic system of canals and tube feet used for locomotion, feeding, and gas exchange. Ascaris is a nematode; Hydra is a cnidarian; the house fly is an insect — none have a water vascular system.

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General Science and Ability QUESTION #185

Question 5131

‘Blue dwarfs’ and ‘Red giants’ respectively refer to:

Moons of Jupiter
Young star and Old star✔️
Old star and Young star
None of these

Correct Answer Logic:

Blue dwarfs are typically young/hot stars; Red giants are stars in late evolution.

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Aptitude QUESTION #10986

Question 5132

A cube of side $4$ cm is painted red on all faces and then cut into $64$ smaller identical cubes. How many of the small cubes have paint on exactly two faces?

$12$
$24$✔️
$36$
$48$

Correct Answer Logic:

In an $n \times n \times n$ cube, cubes with exactly 2 painted faces lie on the edges but not at corners. There are $12$ edges, each with $(n-2)$ such cubes. For $n=4$: $12 \times (4-2) = 12 \times 2 = 24$.

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Pakistan Affairs QUESTION #162

Question 5133

What significant disadvantage did East Pakistan face at the time of Partition in 1947?

It lost control over agricultural resources
It had only 5% of the industrial workers of undivided Bengal✔️
It gained control over Calcutta
It had the majority of financial sectors

Correct Answer Logic:

Most industrial infrastructure, especially jute mills, remained in West Bengal (India) while the raw material was in East Pakistan.

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Planning QUESTION #4969

Question 5134

In the Gravity Model for trip distribution, if the distance between zones A and B doubles while attractions remain constant, the trips between them will:

Reduce to half
Reduce to one-fourth✔️
Double
Remain unchanged

Correct Answer Logic:

The Gravity Model formula $T_{ij} = \frac{P_i \times A_j}{d_{ij}^n}$ shows trips are inversely proportional to distance raised to a power (typically 2). When distance doubles: $\frac{1}{(2d)^2} = \frac{1}{4d^2}$, reducing trips to one-fourth.

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Math Physics Chemistry Biology QUESTION #11255

Question 5135

Which vitamin is synthesized by bacteria in the human large intestine?

Vitamin C
Vitamin D
Vitamin K✔️
Vitamin A

Correct Answer Logic:

Vitamin K (specifically K$_2$ or menaquinone) is synthesized by beneficial bacteria in the large intestine. It is essential for blood clotting and bone metabolism.

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English QUESTION #2745

Question 5136

Identify the ERROR in: 'She is more smarter than her sister.'

She
is
more
smarter✔️

Correct Answer Logic:

'Smarter' is already a comparative adjective. Adding 'more' creates a double comparative, which is grammatically incorrect. It should be either 'smarter' or 'more smart'.

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Physics QUESTION #7293

Question 5137

An object is shot from the bottom of a smooth inclined plane at $60°$ with the horizontal and travels distance $x_1$ along the plane. When the inclination is reduced to $30°$ and the object is shot with the same speed, it travels $x_2$. The ratio $x_1 : x_2$ is:

$1:\sqrt{2}$
$\sqrt{2}:1$
$1:\sqrt{3}$✔️
$1:2\sqrt{3}$

Correct Answer Logic:

For a projectile launched along a smooth inclined plane, the range along the incline is: $x = \dfrac{2u^2\sin(\theta-\alpha)\cos\theta}{g\cos^2\alpha}$, where $\alpha$ is the incline angle and $\theta$ the launch angle from horizontal.

When the projectile is fired along the incline: $\theta = \alpha$, so $\sin(\theta-\alpha) = 0$... Using the general formula and applying both cases gives $x_1 : x_2 = \mathbf{1:\sqrt{3}}$.

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English QUESTION #2765

Question 5138

Find the word OPPOSITE IN MEANING to 'Transparent'.

Clear
Obvious
Opaque✔️
Visible

Correct Answer Logic:

'Transparent' means allowing light to pass through so objects can be clearly seen (also means open/honest). Its antonym is 'Opaque', which means not allowing light to pass through or not clear.

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Chemistry QUESTION #7362

Question 5139

The correct set of four quantum numbers for the valence electron of rubidium ($Z = 37$) is:

5, 0, 0, +½✔️
5, 1, 0, +½
5, 1, 1, +½
6, 0, 0 +½

Correct Answer Logic:

Electronic configuration of Rb (Z=37):
[Kr] 5s¹

The valence electron is in the 5s subshell:

$n = 5$
$\ell = 0$ (s-subshell)
$m = 0$
$s = +\frac{1}{2}$

So the quantum numbers are (5, 0, 0, +½).

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Planning QUESTION #5002

Question 5140

In housing affordability analysis, if median household income is $40,000 and median house price is $200,000, what is the price-to-income ratio?

2.0
3.0
5.0✔️
8.0

Correct Answer Logic:

Price-to-Income Ratio = $\frac{\text{Median House Price}}{\text{Median Annual Household Income}} = \frac{200,000}{40,000} = 5.0$. Ratios above 3-4 indicate affordability problems; ratios above 5 suggest severe affordability crisis requiring policy intervention.

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