A Story of Numbers Class 8 Computational Thinking and AI | Step-by-Step Video Solution

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Class 8 Maths – Practice Question Paper

10 Challenging Questions | Logical Reasoning • Number Systems • Patterns

Practice Instructions: Read each question carefully and select the correct option wherever options are provided. Use the diagrams and notes given with each question.
1
Some terms are missing in between the sequence. Find the missing terms in the order from left to right.
VII, VI, VI, VII, V, VIII, ______, _______, III, X

(Check the solution at the end of the post — video link attached.)

a) VI, IX
b) V, VIII
c) IV, IX
d) IV, V
2
Find the odd one out from the following:

(Check the solution at the end of the post — video link attached.)
Question 2 odd one out

3
In each of the given options, the weight of one bag is written in the Roman numeral form and that of the other bag is in Hindu-Arabic form. Identify the option that displays the tilt of the balance correctly. Note: The balance tilts towards the larger weight.

(Check the solution at the end of the post — video link attached.)
Question 3 balance and weights

4
On the abacus, select two poles, A and B, where pole B has fewer beads than pole A. Exactly one bead from pole A must be moved to pole B. If more than one pole has fewer beads than A, move the bead to the pole that has the maximum number of beads among those poles. After making this single move, what is the highest possible 6-digit number that can be formed?

(Check the solution at the end of the post — video link attached.)
Question 4 abacus

a) 3,62,046
b) 4,72,035
c) 4,72,046
d) 4,62,045
5
What will come in place of “?”
Note: All the numerals on the left of each term are from the same number system

(Check the solution at the end of the post — video link attached.)
Question 5 number system

a) 18
b) 90
c) 36
d) 180
6
A 3-digit code is formed using Chinese numerals (Zongs) and Roman numerals. Each row represents a guess, along with a statement describing how correct the guess is. Using these clues, determine the correct code.

Question 6 code puzzle

7
If certain numbers are coded as shown in the image, what would be the code for 208?

Question 7 coding puzzle

8
Two 2-digit numbers are represented below by stacking balls on poles. If you can shift/move EXACTLY ONE ball from a pole to any of the other three poles, what will be the MINIMUM possible difference between the numbers, finally?

Question 8 balls on poles

a) 1
b) 2
c) 11
d) 13
9
Sam wants to create a 4-digit password using the buttons (Chinese numerals – Zongs) from the given screens. He must press the buttons in the same sequence as he wants the digits in the password to appear.
Rules:
• Every next button pressed must have a greater digit than the previous button
• No two adjacent digits in the password can be selected from the same screen and from buttons of the same colour
How many different passwords can Sam form?

Question 9 password puzzle

a) 1
b) 2
c) 3
d) 4
10
Rearrange the numbers in Set A into ascending order, as shown in Set B. The blocks can be rearranged only by swapping adjacent blocks. What is the MINIMUM number of swaps required to do this?
Note: Blocks that have common sides are considered to be adjacent. Blocks that have a common corner alone are not adjacent

Question 10 adjacent block swaps

a) 3
b) 4
c) 5
d) 6

🎥 Video Solution: Questions 1–5

Watch the complete step-by-step solution for Questions 1 to 5.

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📺 Questions 6–10 Solution Coming This Week!

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