7th April

Class 4C and 4T are tested in maths in February and December. Their results are shown in the tables below.

Which one of these sentences can be concluded from the above information?

• All students in 4C and 4T improved their maths results between February and December.

• No students in 4T made any progress in maths over the year.

• It was impossible to score 20/20 on any of the maths tests. 

• Overall, 4C’s maths results improved more than those of 4T between February and December.

Answer explanation

Read each of the sentences one-by-one, and check them against the table. The correct answer is that 4C’s maths improved more than those of 4T because they improved their average while 4T didn’t. The other answers are incorrect: it was still possible to score 20/20 even though none of the students did; the lowest and highest-scoring 4T students improved their maths results, and the table excludes middle-scoring students who potentially didn’t improve their results.  

David starts with a number. 

He adds 5 to it, and then he divides it by 3. 

Finally, he multiplies by 4. 

He finishes with the number 16. 

What number did David start with?

• 8

• 6

• 7

• 9

Answer explanation

7 + 5 = 12

12/3 = 4

4 × 4 = 16

Find the word that names a necessary part of the word BOOK

• Paper

• Pages

• Numbers

• Fiction

Answer explanation

All words are optional for books except pages. 

Pool Safety Notice

Question

What do you think are the major causes of drowning deaths in children?

• poorly maintained pool gates and latches

• select latching pool gates and latches

• leaving the children unattended near water sources

• propped open pool gates and faulty latches

Answer explanation

Propped open pool gates and faulty latches are a major cause of drowning deaths in young children.

A woman’s pulse rate is 10 beats every 15 seconds. 

What is her rate in beats per minute?

• 40 beats per minute

• 15 beats per minute

• 35 beats per minute

• 60 beats per minute

Answer explanation

There are 60 seconds in a minute.

15 × 4 = 60.

Therefore, 10 beats × 4 = 40 beats per minute. 

What angle arc should subtend at the centre of the circle to show the distribution of oxygen in the human body?

• 120 degrees

• 180 degrees

• 234 degrees

• 126 degrees

• 280 degrees

Answer explanation

The given question is solved by finding the angle the arc subtends at the centre of the circle to show the distribution of oxygen with other elements in the human body.

Percentage of oxygen in human body = 65%

The angle the arc subtends at the centre of the circle to show the distribution of oxygen with other elements in the human body = 65 x 360^o  

Steve, Vikas, and Chantelle are playing a game that involves red and blue marbles. Every red marble is worth the same number of points and every blue marble is worth the same number of points. Steve has 5 red marbles and 2 blue marbles, totaling 25 points. Vikas has 3 red marbles and 6 blue marbles, totaling 39 points. If Chantelle has 3 red marbles and 3 blue marbles, how many points does she have?

• 20

• 32

• 24

• 27

• 28

Answer explanation

Step 1:

If we add Steve and Vikas’ marbles and points, we have 8 red marbles and 8 blue marbles total of 25 + 39 = 64 points.

Step 2:

Hence, the value of one red marble and one blue marble must be 64/8 = 8 points.

Step 3:

Therefore, the value of three red marbles and three blue marbles is 3 x 8 = 24 points.

Thus, the answer is 24.

The diameter of the given semi-circle is 20. Its perimeter is ….

• 10 (π + 1)

• 10 (π + 2)

• 10 (π + 4)

• 5π

• 10 π 

Answer explanation

Within a school competition, a 200-metre race is organised.

Josh covers the distance in 28 seconds while Jack covers the same distance in 40 seconds.

When Josh reaches the finish line, how far is Jack from the finish line?

• 12 cm

• 55 m

• 5 m

• 50 m

• 60 m

Answer explanation

otal distance = 200 metres

Jack: 200 metres in 40 seconds. That is 200/40 metres per second.

Hence, Jack’s speed is 5 metres/second.

 

Josh completes the race in 28 seconds. This would mean that Jack has only travelled:

·      5 m x 28 seconds = 140 metres

Using the above information, the remaining distance for Josh to travel is 200 metres – 140 metres = 60 metres

Therefore, Josh beats Jack by 60 m.

In an examination, a candidate is required to pass all five different subjects. The number of ways he can fail is:

• 31

• 32

• 17

• 16

• 21

Answer explanation

The candidate will fail if he fails either in 1 or 2 or 3 or 4 or 5 subjects.

Number of different outcomes = 2⁵ = 32.

Only one way he can pass all subjects.

So, number of ways he can fail = 32 - 1 = 31.