Unit Test (Solutions): Patterns Around Us | Mathematics for Class 4 (Maths Mela: New NCERT) PDF Download

Total Marks: 20
Attempt all questions.

• Question numbers 1 to 4 carry 1 mark each.
• Question numbers 5 to 9 carry 2 marks each.
• Question numbers 10 to 11 carry 3 marks each.

Q1. Which of the following numbers is an odd number? (1 Mark)
(a) 18
(b) 42
(c) 57
(d) 64
Ans: (c) 57

An odd number cannot be divided into two equal parts without something left. 57 leaves a remainder of 1 when divided by 2.

Q2. What is the next number in the pattern: 2, 4, 6, 8, __? (1 Mark)
(a) 9
(b) 10
(c) 11
(d) 12
Ans: (b) 10

The numbers increase by 2 each time. So the next number is 8 + 2 = 10.

Q3. Which pattern correctly describes the numbers: 3, 6, 9, 12, 15? (1 Mark)
(a) Multiply by 2
(b) Add 3
(c) Subtract 3
(d) Divide by 2
Ans: (b) Add 3

Each number increases by 3 in the given sequence.

Q4. Which of these is a repeating pattern? (1 Mark)
(a) 1, 2, 4, 8
(b) A, B, C, D
(c) Circle, Square, Triangle, Circle, Square, Triangle
(d) 2, 4, 6, 10
Ans: (c) Circle, Square, Triangle, Circle, Square, Triangle

The same group of shapes repeats in the same order.

Q5. Write two even numbers and two odd numbers between 20 and 30. (2 Mark)
Ans: Even numbers: 22, 28
Odd numbers: 21, 27
Even numbers can be divided into two equal parts. Odd numbers leave a remainder of 1 when divided by 2.

Q6. A child arranges coins in rows. The first row has 3 coins, second row 5 coins, third row 7 coins. (2 Mark)
(a) What type of numbers are these?
(b) What will be the number of coins in the next row?
Ans: (a) These are odd numbers.
(b) Next row will have 9 coins, as each row increases by 2.

Q7. Complete the pattern and explain the rule: (2 Mark)
5, 10, 15, ___, ___
Ans: Next two numbers: 20, 25
Rule: Add 5 each time to get the next number. It is a skip-counting pattern by 5.

Q8. Identify whether the number 84 is even or odd. Give a reason. (2 Mark)
Ans: 84 is even.
It ends in 4, which is an even digit. 
Also, 84 ÷ 2 = 42 with no remainder, so it can be divided into two equal parts.

Q9. Sita creates a pattern with tiles: red, blue, green, red, blue, green... What will be the color of the 10th tile? (2 Mark)
Ans: The pattern repeats every 3 tiles: red (1), blue (2), green (3)...
10 ÷ 3 = 3 remainder 1 → So the 10th tile is the 1st color = Red

Q10. Draw and complete the next two figures in this shape pattern:  (3 Mark)
Also, describe the type of pattern and its cycle.
Ans: Next two figures:
This is a repeating pattern. The cycle is of three shapes: square, triangle, circle, repeating in the same order.

Q11. Write all the odd and even numbers between 11 and 20. Then count how many of each there are.  (3 Mark)
Ans: Odd numbers: 11, 13, 15, 17, 19 → Total: 5
Even numbers: 12, 14, 16, 18, 20 → Total: 5
There are equal numbers of odd and even values between 11 and 20.