AISSEE Mental Ability: 5 Tricks That Fool Students

The AISSEE Mental Ability Cheat Code: 5 Question Types That Trick Every Student

The Relatable Story:

Last year, a student walked into our center at 2ND STOP, S ALANGULAM, Kulamangalam Main Rd, Madurai. Let’s call him Vikram. Bright kid. Topped his class in mathematics. Could solve complex fractions in his sleep. But when he attempted the AISSEE mock test, his Mental Ability score was… disappointing.

Vikram was frustrated. “Sir, I’m good at math. Why can’t I crack these puzzles?”

Here’s what I told him: It’s not about being smart. It’s about knowing how the paper is designed.

The Mental Ability section (also called Intelligence or Reasoning) is the silent killer of the All India Sainik School Entrance Examination (AISSEE) . It carries 50 marks for Class 6 and significant weightage for Class 9 . Most students—even the “smart” ones—lose marks here because they don’t understand the patterns. They try to solve every question like it’s a new problem. But here’s the secret: The exam repeats the same 5 tricky question types, year after year.

At Vision Defence Institute, recognized for the best AISSEE coaching in Madurai, we’ve analyzed decades of previous papers. Today, I’m going to share the cheat code: the 5 question types that trick every student, and exactly how to solve them.

Why the Mental Ability Section Decides Your Sainik School Dream

Let’s look at the exam pattern first.

AISSEE Class 6 Exam Structure

For Class 9, the pattern includes Science and Social Studies, but Intelligence remains a core section .

Here’s what most students miss: The Intelligence section is often the differentiator. Why? Because Mathematics and Language are heavily practiced in school. General Knowledge can be memorized. But Mental Ability tests how your brain works under pressure .

The questions are designed to look complicated. They use patterns, relationships, and sequences that seem confusing at first glance. But once you know the type of question, the solution becomes obvious.

Let’s dive into the 5 trickiest question types.

Question Type #1: The “Hidden Pattern” in Number Series

Why it tricks students: Most students look at the numbers and try to apply simple addition or multiplication. But the pattern is often more subtle—it might be alternating operations, or based on prime numbers, or even the sum of digits.

The Classic Example

Look at this series: 2, 6, 12, 20, ?

What’s the next number?

The wrong approach: “Add 4, then add 6, then add 8… so next add 10 = 30.” That works here, but it’s too simplistic and won’t work for tougher variations.

The cheat code: Look for the relationship with position.

• Position 1: 1 × 2 = 2

• Position 2: 2 × 3 = 6

• Position 3: 3 × 4 = 12

• Position 4: 4 × 5 = 20

• Position 5: 5 × 6 = 30

Answer: 30

Another Tricky Variation

Series: 3, 9, 27, 81, ?

This seems obvious—multiply by 3 each time. But the trick comes when they mix it up.

Series: 3, 9, 27, 81, 243, ? Now what?

Most students continue multiplying by 3: 243 × 3 = 729.

But the real pattern might be: Add digits of previous number (which doesn’t work here—so always check multiple patterns).

The cheat code for AISSEE: Always check three patterns in order:

1. Simple arithmetic (addition/subtraction)

2. Multiplication/division

3. Square/cube relationships

Practice Question

Try this: 5, 11, 23, 47, ?

(Scroll to the end for the answer)

Question Type #2: The “Mirror Image” Analogy Trap

Why it tricks students: Analogy questions (A : B :: C : ?) seem straightforward. But the trick is when the relationship isn’t obvious, or when it’s based on position rather than meaning.

The Classic Example

Book : Page :: Tree : ?

Most students think: “Book has pages, so tree has leaves.” But that’s too simple.

The cheat code: Identify the exact relationship.

• A book is made up of pages

• A tree is made up of… branches? Leaves? Wood?

Actually, the precise relationship is: Page is a component of a Book. So we need a component of a Tree.

Answer: Branch (or Leaf, depending on the options given)

The Position-Based Trap

Sometimes the relationship is based on alphabetical position.

A : Z :: B : ?

If you think alphabetically, A is first, Z is last. So B is second, so answer should be Y (second last).

Answer: Y

Practice Question

Paw : Cat :: Hoof : ?

(Answer at the end)

Question Type #3: The “Invisible Rule” in Classification

Why it tricks students: Classification questions give you four words or numbers. Three are similar in some way; one is different. The trick is that the similarity might not be obvious—it could be based on grammar, syllables, or even the number of letters.

The Classic Example

Which one is different?

Apple, Mango, Banana, Carrot

Most students: “Carrot is a vegetable, others are fruits.” Correct.

But they make it trickier:

Dog, Cat, Cow, Lion

Most students: “Lion is wild, others are domestic.” But maybe all are mammals, so that doesn’t work. Actually, Lion is the only one that isn’t commonly farmed. Or maybe Cow is the only herbivore.

The cheat code: Look for multiple layers of classification.

1. Category (fruit/vegetable, wild/domestic)

2. Physical properties (color, size, sound)

3. Grammar (masculine/feminine, singular/plural)

4. Alphabetical (vowels/consonants, position)

The Number Classification Trap

121, 144, 169, 196

All are perfect squares:

• 121 = 11²

• 144 = 12²

• 169 = 13²

• 196 = 14²

So all are similar, right? But wait—check the digits.

The trick: 121 reads the same forwards and backwards (palindrome). The others don’t.

Answer: 121 is different.

Practice Question

37, 47, 57, 67

Which is different and why?

(Answer at the end)

Question Type #4: The “Missing Piece” in Figure Matrix

Why it tricks students: For Class 6, AISSEE includes non-verbal reasoning. Students see a 3×3 grid with figures, and one figure is missing. The patterns can be rotation, addition of elements, or mirror images.

The Classic Example

Imagine a 3×3 grid:

What goes in the missing spot?

The cheat code: Look for patterns in rows AND columns.

• Row 1: 1 dot, 2 dots, 3 dots

• Row 2: 1 dot, 2 dots, so missing should be 3 dots

• Row 3: 1 dot, 2 dots, 3 dots

Answer: Three dots (⬤⬤⬤)

The Rotation Trap

Sometimes figures rotate. If the first column has shapes facing up, second column facing right, third column should face down.

The cheat code: Check three things in order:

1. Number of elements

2. Direction/orientation

3. Addition/removal of features

Question Type #5: The “Word Play” in Coding-Decoding

Why it tricks students: Coding questions look mathematical, but they’re often based on alphabetical positions. Students either overcomplicate or miss the pattern entirely.

The Classic Example

If DOG is coded as 26, how is CAT coded?

The wrong approach: Trying to find some complex mathematical formula.

The cheat code: Check alphabetical positions.

• D = 4, O = 15, G = 7

• 4 + 15 + 7 = 26

So CAT:

• C = 3, A = 1, T = 20

• 3 + 1 + 20 = 24

Answer: 24

The Reverse Alphabet Trap

Sometimes they use reverse alphabetical order (A=26, B=25, Z=1).

If BALL = 25 + 26 + 15 + 15 = 81, then CAT would be:

• C = 24, A = 26, T = 7

• 24 + 26 + 7 = 57

The cheat code: Always check both forward and reverse alphabetical positions if the first pattern doesn’t work.

Practice Question

If PEN is coded as 161514, how is BOOK coded?

(Answer at the end—hint: it’s about position numbers written consecutively)

The 3-Step AISSEE Mental Ability Strategy

Now that you know the 5 trickiest question types, here’s how to actually prepare.

Step 1: Master the Patterns (Months 1-2)

At Vision Defence Institute, we start our AISSEE coaching in Madurai by drilling pattern recognition. Not solving thousands of random questions, but understanding the categories of questions.

• Week 1-2: Number series patterns (addition, multiplication, square, cube, prime)

• Week 3-4: Analogy types (functional, physical, alphabetical)

• Week 5-6: Classification rules

• Week 7-8: Non-verbal reasoning

Step 2: Timed Practice (Months 3-4)

Once you know the patterns, speed matters. The AISSEE exam gives you about 1 minute per question in the Intelligence section .

• Practice 25-question sets in 30 minutes

• Track which question types take you the longest

• Focus on eliminating the time-wasters

Step 3: Mock Tests with Analysis (Months 5-6)

This is where most Sainik School coaching centers stop. But we go further.

After every mock test at our Army coaching centre in Madurai, we don’t just give scores. We analyze:

• Which question types did you get wrong?

• Was it a conceptual mistake or a silly error?

• What pattern did you miss?

Our success rate comes from this detailed analysis. Students don’t just practice—they improve.

Why Vision Defence Institute for AISSEE?

Parents often ask us: “There are so many coaching centers. Why should we choose you?”

Here’s the honest answer.

What Makes Us Different

Our Track Record

We’ve helped hundreds of students from Madurai and surrounding areas secure admission in top Sainik Schools. Our students don’t just clear AISSEE—they build the foundation for NDA, CDS, and AFCAT success later .

What Parents Say

“My son joined Vision Defence for Class 6 AISSEE coaching. Within 3 months, his reasoning scores improved from 40% to 85%. The teachers don’t just teach—they mentor.” — Mrs. Meena, mother of AISSEE 2024 selected student

Free Resource: Get the Full Question Bank

I’ve only shared 5 question types here. But there are at least 15 distinct patterns that appear regularly in the AISSEE Mental Ability section.

At Vision Defence Institute, we’ve compiled them all into a comprehensive AISSEE Mental Ability 200 Question Bank—with step-by-step solutions for every pattern.

What’s Inside:

• 200 hand-picked questions from previous years

• 15 pattern categories with detailed explanations

• Shortcut methods for each question type

• Practice exercises with answer keys

And it’s completely free.

How to Get It:

1. WhatsApp us at +91 81222 87718 with the message “AISSEE Mental Ability”

2. We’ll send you the PDF instantly

3. Start practicing the patterns today

No strings attached. No payment required. Just pure value to help your child crack the exam.

Connect With Us

We’re here to help. Whether you’re in Madurai or anywhere in Tamil Nadu, reach out:

• Address: 2ND STOP, S ALANGULAM, Kulamangalam Main Rd, Madurai, Tamil Nadu 625017

• WhatsApp: +91 81222 87718

• Email: visiondefencemduofficial@gmail.com

• Facebook: https://www.facebook.com/vision_defence

• Instagram: https://www.instagram.com/vision_defence_mdu

• YouTube: https://youtube.com/@visiondefenceinstitutemadurai

Visit us for a free demo class for defence exams and see why we’re considered the best defence academy in Tamil Nadu.

Answers to Practice Questions

1. Number series: 5, 11, 23, 47, ?

   • Pattern: ×2 + 1

   • 5×2 + 1 = 11

   • 11×2 + 1 = 23

   • 23×2 + 1 = 47

   • 47×2 + 1 = 95

2. Analogy: Paw : Cat :: Hoof : ?

   • Paw is the foot of a Cat

   • Hoof is the foot of a Horse

3. Classification: 37, 47, 57, 67

   • 37 is prime, 47 is prime, 67 is prime

   • But 57 = 3 × 19 (not prime)

   • 57 is different

4. Coding: PEN = 161514

   • P = 16th letter, E = 5th, N = 14th

   • Write positions consecutively: 16 5 14 = 161514

   • BOOK: B=2, O=15, O=15, K=11

   • 2151511

Conclusion: Crack the Code, Crack the Exam

The AISSEE Mental Ability section isn’t about being a genius. It’s about knowing the patterns.

Every year, thousands of students lose marks because they treat each question as a new puzzle. The toppers know that the exam repeats the same 5 tricky question types—number series, analogy, classification, figure matrix, and coding—with slight variations.

Now you know the cheat code.

Your next step: Download the AISSEE Mental Ability 200 Question Bank from us. Practice these patterns until they become second nature. And when you walk into that exam hall on April 5, 2026 , you’ll smile when you see those “tricky” questions—because you’ll already know the answer.

Get the full ‘AISSEE Mental Ability 200 Question Bank’ for FREE.
WhatsApp +91 81222 87718 now.