All questions of Maths Tricks for Class 1 Exam

Rohani's rank from the top = 7th, Rohani's rank from the bottom = 26th. Total number of students = 7+26?1=32. Therefore, there are 32 students in the class.

Pattern:
To find the missing number in the series, we need to identify the pattern or rule that governs the sequence of numbers. Let's analyze the given series: 2, 5, 9, _________, 20, 27.

Step 1: Difference between consecutive numbers:
The first thing we can observe is that the difference between consecutive numbers is increasing.
- The difference between 5 and 2 is 3.
- The difference between 9 and 5 is 4.
- The difference between 20 and 9 is 11.

Step 2: Differences of differences:
Now, let's calculate the differences between the differences of consecutive numbers:
- The difference between 4 and 3 is 1.
- The difference between 11 and 4 is 7.

Step 3: Identifying the pattern:
From step 2, we can observe that the differences of differences are not constant. However, we can notice that the differences of differences are increasing by 6.

Step 4: Applying the pattern:
Now, let's apply the pattern to find the missing number.
- The difference between 7 and 1 is 6.
- Adding 6 to the last difference of 7, we get 13.
- Adding 13 to the last number 9, we get 22.

Answer:
Therefore, the missing number in the series is 22.

Given that Modi's face is towards the west, his left hand will point towards the north when he is performing a headstand.

In option B, "Rust" and "Crest" are not related in the same way as the other pairs. "Rust" is a natural process, while "Crest" is a physical structure or a peak.

Explanation:
In this question, we are given four options: Mother, Grandfather, Father, and Wife. We need to identify which one does not belong to the group formed by the other three options.

Mother, Grandfather, and Father:
The first three options, Mother, Grandfather, and Father, all represent different members of a family. Mother is a female parent, Grandfather is a male parent at the second level of generation, and Father is a male parent at the first level of generation. These three options are related in terms of their roles in a family and their gender.

Wife:
On the other hand, the option Wife represents the marital status of a female. It does not belong to the group formed by the other three options because it does not represent a specific family member. A wife can be a mother, daughter, sister, or any other female family member, depending on the context. Unlike the other options, Wife does not specify a particular role or position in the family.

Conclusion:
Based on the above analysis, we can conclude that the option Wife is the one that does not belong to the group formed by the other three options (Mother, Grandfather, and Father).

P is in the south-west direction from Q, and R is in the south-east direction from Q. Therefore, R is in the east direction from P.

Tree, Plant, Shrub, Farm

The three items that form a group in this question are Tree, Plant, and Shrub. The item that does not belong to this group is Farm. Let's break down the characteristics of each item to understand why this is the case.

1. Tree:
- A tree is a type of plant.
- It has a woody stem and branches.
- It typically has a long life span.
- It can grow to be very tall and provide shade.

2. Plant:
- A plant is a living organism that belongs to the kingdom Plantae.
- It can be a tree, shrub, herb, or any other type of vegetation.
- It typically has roots, stems, and leaves.
- It uses photosynthesis to convert sunlight into energy.
- Plants play a crucial role in the ecosystem by producing oxygen and providing food for other organisms.

3. Shrub:
- A shrub is a type of plant.
- It is smaller than a tree and usually has multiple stems.
- It is often found in gardens and landscapes.
- Some shrubs produce flowers or fruits.

4. Farm:
- A farm is a piece of land that is used for agricultural purposes.
- It can include various types of plants and animals.
- Farms are typically managed by farmers who grow crops or raise livestock.
- While a farm may have trees, plants, and shrubs on its premises, it is not inherently a type of tree, plant, or shrub itself.

Conclusion:
Based on the characteristics and classifications of each item, Tree, Plant, and Shrub share similarities as they all fall under the category of vegetation. However, Farm is not a type of vegetation but rather a piece of land used for agriculture. Therefore, Farm is the item that does not belong to the group formed by Tree, Plant, and Shrub.

Pattern Analysis:
The given sequence appears to be increasing by a constant value each time. Let's find the pattern.
- 4 + 3 = 7
- 7 + 5 = 12
- 12 + 7 = 19
- 19 + 9 = 28

Identifying the Missing Term:
To find the missing term, we need to continue the pattern by adding the next odd number to the last term.
- 28 + 11 = 39
Therefore, the missing term in the sequence is 39 (Option C).

Explanation:

The objective of this question is to identify the letter or group of letters that is different from the others. Let's analyze each option to determine the answer.

a) H:
The letter "H" does not possess any unique characteristics that differentiate it from the other options. Therefore, it is not the correct answer.

b) Q:
The letter "Q" has a unique curved tail that sets it apart from the other options. It is the only letter that has this distinct feature, making it the correct answer.

c) T:
The letter "T" does not have any unique characteristics that distinguish it from the other options. Thus, it is not the correct answer.

d) Z:
The letter "Z" does not possess any unique features that differentiate it from the other options. Therefore, it is not the correct answer.

Conclusion:
After analyzing each option, we can determine that the letter "Q" is the correct answer as it has a unique curved tail, setting it apart from the other letters.