Mental Math Task 1

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| By Anam

Anam

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Quizzes Created: 1 | Total Attempts: 128

Questions: 9 | Attempts: 129 | Updated: Mar 15, 2023

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Questions and Answers

1.

What are the next two numbers in sequence? 3, 6, 10, 15, 21, ____, _____

Explanation
The sequence follows a pattern where each number is the sum of the previous number and the position of that number in the sequence. For example, 6 is the sum of 3 and 2 (the position of 6 in the sequence). Similarly, 10 is the sum of 6 and 3. Following this pattern, the next number should be the sum of 10 and 4 (the position of the next number), which is 14. Continuing this pattern, the next number should be the sum of 15 and 5, which is 20. However, the given answer does not follow this pattern and does not provide a clear explanation for the next two numbers in the sequence.

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4
2.

A train journey takes 3 hours. If I arrive at 1:30 pm, at what time did I leave?
- A.
  
  11:30 am
- B.
  
  10:30 am
- C.
  
  4:30 pm
Correct Answer
B. 10:30 am

Explanation
If the train journey takes 3 hours and the person arrives at 1:30 pm, then they must have left 3 hours before that time. Subtracting 3 hours from 1:30 pm gives us 10:30 am, which is the time they left.

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3.

Which part of the circle is highlighted in the circle below
- A.
  
  Diameter
- B.
  
  Radius
- C.
  
  Centre
Correct Answer
A. Diameter

Explanation
The highlighted part in the circle is the diameter. The diameter is a line segment that passes through the center of the circle and connects two points on the circumference. It is the longest chord in a circle and divides it into two equal halves.

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4.

A pen costs $ 4.60. How much will 2 pen cost?

Correct Answer
$9.2, 9.2, $ 9.2

Explanation
The cost of one pen is $4.60. To find the cost of 2 pens, we multiply the cost of one pen by 2. Therefore, 2 pens will cost $9.20.

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5.

The side of a regular pentagon is 3 cm. What is the perimeter?
- A.
  
  10 cm
- B.
  
  20 cm
- C.
  
  15 cm
Correct Answer
C. 15 cm

Explanation
A regular pentagon has all sides equal in length. In this case, each side is given as 3 cm. To find the perimeter, we need to add up the lengths of all the sides. Since there are 5 sides, we multiply the length of one side (3 cm) by 5. Therefore, the perimeter of the regular pentagon is 15 cm.

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6.

1- ___ = 0.8

Correct Answer
0.2, 0. 2, 0 .2

Explanation
The correct answer is 0.2, 0. 2, 0 .2.

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7.

What are the chances of rolling a 3 on a 6 sided dice?
- A.
  
  Unlikely
- B.
  
  Likely
- C.
  
  Even chance
- D.
  
  Certain
Correct Answer
A. Unlikely

Explanation
The chances of rolling a 3 on a 6-sided dice are unlikely because there is only one face with a 3, out of a total of six possible outcomes. This means that the probability of rolling a 3 is 1 out of 6, or approximately 16.67%. Therefore, it is less likely to roll a 3 compared to rolling any other number on the dice.

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8.

60x8

Correct Answer
480, 4 80, 48 0

Explanation
The given expression 60x8 can be simplified by multiplying 60 and 8. The product of 60 and 8 is 480.

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9.

Which one do you like?
- A.
  
  8
- B.
  
  16
- C.
  
  32
Correct Answer
B. 16