Steves Math quiz 17th

A shopkeeper purchased 39 kg of oranges and 58 kg of apples. Which packet weighs less and by how much?

• Oranges 20kg

• Oranges 19kg

• Apples 20kg

• Apples 19kg

Answer explanation

Weight of Oranges = 39 kg

Weight of Apples = 58 kg

The weight of Oranges is less.

Difference in weight of rice and weight of pulses = 58 kg – 39 kg = 19 kg

The time in Melbourne is 4 hours ahead of the time in Singapore. When it is 11 AM in Melbourne, what will be the time in Singapore?

• 9:30 AM

• 7 AM

• 3 PM

• 6:30 PM

• 4:30 AM

Answer explanation

11 AM in Melbourne will be 7 AM in Singapore (-4 hours)

A field trip that includes travel and food, costs $700 for an entire class.

All students wanted to go on the trip and organised a fundraiser. They raised a total of $460 for the trip.

The teacher then asked all students to deposit an extra $12 to cover the deficit.

How many students are there in the class?

• 58

• 20

• 19

• 30

• 96

Answer explanation

Let the number of students in the class be x.

So, we can write the algebraic relationship in equation form.

12x + 460 = 700

12x = 700 – 460 = 240

x = 240 ÷ 12 = 20

It takes 4 men 6 hours to repair a road. How long will it take 8 men to do the job if they work at the same rate?

• 6 hours

• 4 hours

• 3 hours

• 2 hours

• 5 hours

Answer explanation

If we are doubling the amount of men working on the road at the same rate, the time taken to complete will be halved. 6/2 = 3 hours

Wang wants to pick an outfit that includes a shirt, a pair of pants, and a pair of shoes. He has 2 shirts, 3 pairs of pants, and 2 pairs of shoes and has to select one of each. How many possible outfits could he possibly have?

• 12

• 24

• 7

• 9

• 10

Before Christina’s soccer game, the time is 15:45. After the two-hour and five-minute game (including breaks), what would the time be, in a 12-hour format?

• 5:40 am

• 5:40 pm

• 5:50 am

• 5:50 pm

• 3:45 pm

Answer explanation

Step 1:

Originally, the time is 15:45 – 3:45 pm in 12-hour format.

 

Step 2:

2 hour and 5 minutes later, the time would be 5:50 pm.

 

Thus, the answer is 5:50pm.

John correctly answered 50% of questions in a Science Olympiad test. If there were a total of 40 questions in the exam, how many questions did John get wrong?

• 20

• 15

• 10

• 40

• 0

Answer explanation

50% is equal to halve. So half of 40 is 40/2 = 20.

Tim bought bread and a milk bottle from a grocery shop for $6.50. On the weekend, the bread was on sale at a 50% discount. Tim decided to purchase bread alongside a milk bottle, but this time, it cost him $4.10.   

What was the price of bread on the weekend? 

• $4.20

• $2.40

• $4

• $3.50

• $2.25

Answer explanation

Cost of bread + cost of milk= $6.50 On the weekend: (Cost of bread)/2 + cost of milk = $4.10 Subtracting the above two equations we get: (Cost of bread)/2 = $2.40 Hence, on the weekend the cost of bread was $2.40. 

A 30 cm long piece of string is cut into two parts. 

One part is twice as long as the other. 

What is the length of the shorter part?

• 18 cm

• 10 cm

• 9 cm

• 8 cm

• 15 cm

Answer explanation

If length of short piece is 1 part, then long piece will be 2 parts long. 

Total number of parts = 2 + 1 = 3. 

Length of one part = 30/3 = 10 cm. 

Length of short piece = 10 cm.

Which of these words has both a horizontal and vertical line of symmetry? 

• DOOD

• TOOT

• HOOH

• AKKA

• MAAM

Answer explanation

HOOH is the only word with a line of horizontal and vertical symmetry. 

TOOT and MAAM have vertical lines of symmetry.

DOOD and AKKA have no lines of symmetry.