Explanation

A zoo has some lions and Parrots.

A zoo has x lions and y parrots

 The supervisor counted 15 heads and 50 legs. How many lions are there?

Heads

x + y = 15 

y = 15 – x

x = 4 legs and y has 2 legs

4x + 2y = 50

4x + 2(15-x) = 50

4x + 30 – 2x = 50

2x = 20

X = 20/2

X = 10

So x means lions, so there 10 Lions

CHECKING our answer***

  40 + 10 = 50 legs

Explanation

MS-DOS is an operating system for x86-based personal computers mostly developed by Microsoft.

MS-DOS, its rebranding as IBM PC DOS

Some operating systems attempting to be compatible with MS-DOS are sometimes referred to as "DOS".

Explanation

When inserted into the chest cavity, a chest tube can drain accumulated blood (hemothorax) or air (pneumothorax), allowing the collapsed lung to re-inflate and stabilize the patient's breathing. 

Explanation

 if you suspect a neck injury, you should never tilt the patient's head backward as this could further damage the spinal cord and worsen the injury; instead, keep the head and neck in a neutral position and seek immediate medical attention.

Explanation

Epinephrine can be administered IV or IO as needed. Another route of administration is through an endotracheal tube, commonly used in neonatal resuscitation.

Adrenaline and epinephrine are the same hormone and medication.

It's produced in the adrenal glands and is part of the body's fight-or-flight response

Explanation

 Hypoxia occurs when oxygen is insufficient at the tissue level to maintain adequate homeostasis, stemming from various causes such as hypoventilation.

Explanation

  Safeguard and return them to the family or next of kin should be done with the belongings of a deceased pilgrim

Explanation

Educating pilgrims on hygiene and sanitation is a main preventive measure taken to ensure public health during Hajj. 

Explanation

An art gallery is creating a display featuring four abstract art paintings and three scenery paintings. The only abstract art paintings considered are A, B, C, D, E, and F; the only scenery paintings considered are J, K, L, M, and N.

• If A is displayed, then neither B nor L can be displayed.
• B is displayed only if D is shown.
• C cannot be displayed unless J is displayed.
• K can only be displayed if K is displayed.
• If L is displayed, then M must be displayed.
• N cannot be displayed unless D is not displayed.

 If F is displayed, which one of the following must be true?
A. A is not displayed.
B. B is not displayed.
C. K is not displayed.
D. L is displayed.

If both B and E are displayed, then which one of the following CANNOT be a partial list of items displayed?
A. C, D, E
B. C, J, M
C. C, D, M
D. C, J, K

Each of the following could be displayed together EXCEPT:
A. B and K
B. B and F
C. B and M
D. E and F

If B is displayed, which one of the following is a list of items that could also be displayed?
A. A, M, N
B. C, E, F
C. C, L, M
D. E, J, M

Explanation

Visitors arriving for Umrah or pilgrimage (Hajj) or for seasonal work are required to submit a certificate of vaccination with the quadrivalent (ACYW135) vaccine against meningitis issued no more than 3 years and no less than 10 days before arrival in Saudi Arabia.