Scientific Reasoning MCQs

Question 1

Al-Jolson Airways runs a scheduled flight from Marseilles to Cairo, stopping at Palermo and Benghazi, every day. The plane takes off from Marseille at 08:00 and arrives at Palermo an hour later. After a 10-minute stop, it takes off again and then lands at Benghazi at 10:00, where it takes 10 minutes to refuel before taking off for Cairo. It finally lands in Cairo at 11:30. The aeroplane normally flies at 600 km/h, but on today's flight the pilot encountered turbulence and had to slow down to 500 km/h for 15 minutes. The plane was delayed in the approach to Cairo and had to circle at 300 km/h for 10 minutes before landing. Which of the following graphs best represents the airplane's speed during the journey?

Accepted Answer

Option B

Answer

Option A

Answer

Option C

Answer

Option D

Question 2

Two the edges of Mae's rectangular lawn measure 7 metres.Which one of the following further pieces of information about Mae's lawn would not be sufficient by itself to determine how long the other two sides are?

Accepted Answer

The perimeter of the lawn is 19.2 metres

Answer

The area of the lawn in square metres is numerically equal to its perimeter in metres

Answer

The length of the lawn is 2.5 times its width

Answer

The mean of the length and the width of the lawn is 4.8 metres

Question 3

Abdullah needs to take a bus to Lahore, which leaves once an hour from his hometown. Nobody in his family knows at exactly how many minutes past the hour the bus is scheduled to depart.Aisha is sure that the number is such that, if it were divided by 3. the remainder would be 2. Sharif is certain that the number is such that, divided by 4, there would be a remainder of 3. Abdullah's father has no doubt that the number of minutes is a multiple of 5.Assuming that they have all given correct information, at how many minutes past the hour does the bus depart?

Accepted Answer

35

Answer

5

Answer

15

Answer

45

Question 4

A child is playing a game by placing four straight sticks on the grand.She scores 1 point for every crossing point made. She cannot break any of the sticks.What is the largest number of points that she can score

Accepted Answer

6

Answer

4

Answer

5

Answer

7

Question 5

The yeast I use to make bread doubles in size overnight, but I take a fixed weight away each day.Which one of the following plots could not show the weight of yeast on consecutive days after the ixed weight has been removed?

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 6

I received the following email:I have only $2250 but I want to send two messages to the largest number of addresse worldwide. What is the largest number of addresses I can contact?

Accepted Answer

205,000,000

Answer

123,000,000

Answer

2,230,000,000

Answer

32,000,000

Question 7

A dice is numbered from 1 to 6 in different ways. If 1 is adjacent to 2, 4, and 6, then which of the following statements is necessarily true?

Accepted Answer

3 is adjacent to 5

Answer

1 is adjacent to 3

Answer

2 is opposite to 6

Answer

3 is opposite to 5

Question 8

A cleaning solution is used to remove limescale, CaCO3, from bathroom surfaces. When the solution is sprayed onto the limescale, effervescence (fizzing) occurs and the solid limescale begins to disappear. This chemical reaction is needed because the limescale cannot be removed with water alone. Which of the following statements about this chemical reaction are correct? 1. The cleaning solution is acidic. 2. The effervescence (fizzing) is caused by the release of hydrogen gas. 3. The pH of the reacting solution will go down as the reaction proceeds. 4. The salt produced in the reaction is more soluble than CaCO3

Accepted Answer

1 and 3 only

Answer

1, 2, and 3 only

Answer

1 and 4 only

Answer

2 and 3 only

Question 9

The price for hiring a car is determined by the number of days for which it is to be hired and the number of people who will be using it. The table below shows the prices for groups of up to 5 people hiring cars for up to 7 days. Patrick is part of a group of 5 people on a holiday for 5 days. They will be going on outings each day, and had planned to hire one car for all of them for all 5 days. However, two of the group of people will only be there for the first 3 days, so an alternative is to hire one car for this period and another for the final two days. What will be the difference if they choose this alternative?

Accepted Answer

It will be $2 more expensive

Answer

It will be $5 cheaper

Answer

It will be $2 cheaper

Answer

It will be $5 more expensive

Question 10

A cleaning solution is used to remove limescale, CaCO3, from bathroom surfaces. When the solution is sprayed onto the limescale, effervescence (fizzing) occurs and the solid limescale begins to disappear. This chemical reaction is needed because the limescale cannot be removed with water alone. Which of the following statements about this chemical reaction are correct? 1 The cleaning solution is acidic. 2 The effervescence (fizzing) is caused by the release of hydrogen gas. 3 The pH of the reacting solution will go down as the reaction proceeds. 4 The salt produced in the reaction is more soluble than CaCO3

Accepted Answer

1 and 4 only

Answer

1 and 2 only

Answer

1 and 3 only

Answer

2 and 3 only

Answer

2 and 4 only

Answer

1, 3 and 4

Question 11

In a restaurant recently, I received the following bill: Starter $7.00 Main Course $20.75 Dessert $9.75 Drink $4.50 Service Charge $5.25 TOTAL $47.25 What percentage of the cost of the food and drink had been added to the bill as service charge?

Accepted Answer

12.5%

Answer

11.1%

Answer

14.0%

Answer

15.0%

Question 12

A recipe for tarte Tatin requires: 500g pastry 800g apples 100 g caster sugar 100 ml apple juice 6g of vanilla 50 g of butter Amber, Bekim, Cairo, and Darcy have the following quantities of each ingredient: The quantity is given in the image below Who can make the largest tarte Tatin?

Accepted Answer

Amber

Answer

Bekim

Answer

Cairo

Answer

Darcy

Question 13

Many people were worried when they found that their photocopiers had been sometimes changing numbers; one photocopier sometimes, although not always, changed 6 into 8. A list of prices was copied on this photocopier. The first five prices on the copy·are shown below. $54.80 $60.00 $65.40 $70.80 $78.20 In the original list, the prices had increased by the same amount each time. What was the next price.on the original list?

Accepted Answer

$81.60

Answer

$81.80

Answer

$83.60

Answer

$85.60

Question 14

Mr and Mrs Porter drove down to see Sweeney. Mr Porter drove the first 20 km on the way there, and Mrs Porter drove the rest of the way. On the return journey, she drove the first 30 km and he drove the rest. How much farther did Mrs Porter drive than Mr Porter?

Accepted Answer

20 km

Answer

No farther

Answer

10km

Answer

There is not enough information to work it out

Question 15

In an ecosystem, producers convert the sun's energy into a usable source for other organisms. Primary consumers eat the producers, secondary consumers eat primary consumers, and tertiary consumers eat secondary consumers.The lion is both a scavenger and a secondary consumer. Thus, they may fill more than one role in the ecosystem.If additional cheetahs were introduced into this ecosystem, shortly thereafter we would expect a decrease in the:

Accepted Answer

Hare population

Answer

lion population

Answer

Hyena population

Answer

Dung-rolling beetle population

Question 16

Which of the following is implied by the fact that seafloor spreading at the Mid-Atlantic Ridge is causing the Atlantic Ocean to widen by about 5 centimeters a year?

Accepted Answer

The continents of North America and Europe are moving apart.

Answer

The Mid-Atlantic Ridge is thousands of miles long.

Answer

The Mid-Atlantic Ridge is the largest underwater structure in the Atlantic Ocean.

Answer

The continents of North America and Europe are growing larger at the Mid-Atlantic Ridge.

Question 17

A ballet dancer of mass 80 kg and a wingspan of 1m is executing a spin. She then folds her arms and brings them to within 20cm from the central axis of her body. If she was initially making 3 rotations per second, how many does she make now?

Accepted Answer

75

Answer

8/3

Answer

12

Answer

6

Question 18

Twenty flies are placed in each of four glass tubes. The tubes are sealed. Tubes I and II are partially covered with black paper; Tubes III and IV are not covered. The tubes are placed as shown. Then they are exposed to blue light for five minutes. The number of flies in the uncovered part of each tube is shown in the drawing respond to;

Accepted Answer

both blue light and gravity

Answer

blue light but not gravity

Answer

gravity but not blue light

Answer

neither blue light nor gravity

Question 19

Why is the pupil of the human eye black?

Accepted Answer

The pupil is a hole that allows light to enter but the light is either absorbed or diffused within the eye before it can exit

Answer

The pupil is made up of proteins that are pigmented to appear to give a black appearance

Answer

The pupil can be of any color, not necessarily black

Answer

The vitreous humor behind the pupil is black in color which gives the transparent pupil a black appearance

Question 20

Susan (circle), Ahmad (triangle), and Sam (star) are each walking in an octagonal park on a Sunday morning. At 10:00, the following figure depicts their positions. Susan moves 3 vertices clockwise in each hour, Ahmad moves 1 vertex clockwise each hour, while Sam moves 2 vertices anticlockwise each hour. Will all three ever meet on a vertex at the same instant?

Accepted Answer

Yes, they meet at 15:00

Answer

Yes, they meet at 12:00

Answer

No, they never meet

Answer

Yes, they meet at 17:00

Free Scientific Reasoning MCQs with Answers