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Nothing. The baseline is free. You get your first projected score at the end. Unlock full access for Rs 99 with code NDA2026.

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Mentr currently covers NDA Mathematics (Paper 1). General Ability Test (GAT) is coming soon.

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/ 300

+22

75 · floor to clear

Know your real score.Then raise it.

NDA II · September 13 · - days left

I’m a student. Take my free mock

The problem

Coaching marks flatter you. The cutoff doesn’t.

In class, you solve what you just learned.
In the exam, 120 questions arrive unannounced.
Every wrong guess costs 0.83.
Most find out where they stand on result day.

Find out months earlier. Raise it from there.

The loop

Every attempt teaches the plan.

Your free mock is step one. The loop starts the moment you submit it.

Measure

Your real score out of 300, marked exactly like the paper — +2.5 right, −0.83 wrong.

Plan

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Practice

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Read

Every attempt read. Every mistake filed by topic, with its solution.

Re-plan

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The score doesn’t raise itself.

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A daily mission sized to your day, a to-do list that knows what comes after, and a week view that keeps you honest.

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Wednesday, 29 July- days to NDA

Today’s mission

18 questions · about 18 minutes

46/ 300

floor 75target 120

Begin session

74 marks to your target

Click a tab - see a day inside Mentr ↓

The daily loop

Every day, the next right thing.

A daily mission sized to your day, a to-do list that knows what comes after, and a week view that keeps you honest.

Mentr by Metis Labs

Wednesday, 29 July- days to NDA

Today’s mission

18 questions · about 18 minutes

Focused on Matrices and Determinants, your biggest gap on the way to a safe 120-mark clear.

Shown up: 5 of 7

days

41%

Accuracy

6/14

Topics measured

Marks to target

Begin session Browse the Library

Projected

46 / 300

74 marks to your target

floor 75target 120

Up next

To do

- days to NDA

1
Complete today’s session
18 questions · about 18 minutes
2
Drill Matrices and Determinants
28% recent accuracy · your lowest measured topic
3
Review your mistakes
Spaced repetition of your recent slips.

Free Mock · 27 Jul

Free full mock

Review

−7

4 right · 20 wrong · 0 skipped

This week

60questions practised

last 7 dayspeak Mon

Needs attention

View all topics in Readiness →

Matrices and Determinants

Critical

Trigonometry

Needs work

Analytical Geometry 2D

Needs work

Ranked by expected marks lost. Open Readiness →

Readiness

Am I going to be ready? The honest, in-depth answer.

- days to NDA

Trajectory

Projected marks · last 8 weeks

ProjectedTarget 120Floor 75

Topic mastery

6 topics · weakest first

Analytical Geometry 3D
12% of examCritical
Matrices and Determinants
10% of examNeeds work
Trigonometry
18% of examNeeds work
Differential Calculus
15% of examNeeds work
Algebra
20% of examGrowing
Analytical Geometry 2D
10% of examGrowing

Mock history

Full-length simulations

MockDateScoreAccuracyΔ prev

Mock 2Jul 2052 / 30038%↑ 14
Mock 1Jul 638 / 30030%-

BackFree Mock · 27/7/2026 · results

Your score

−6.6 / 60

4 correct · 20 wrong · 0 skipped · 17%

Solid pace. The 20 wrong ones matter more than the 4 right - go see them. Analytical Geometry 2D is where the marks leaked.

Review answersBack

4Correct

20Wrong

0Skipped

Analysis

Analytical Geometry 2D
0/7 · Critical
Analytical Geometry 3D
0/6 · Critical
Algebra
1/4 · Critical
Differential Calculus
1/3 · Needs Work
Matrices and Determinants
1/2 · Growing
Trigonometry
1/2 · Growing

17% this test · 42% your running average

The pattern costing you the most marks

Assertion & Reason · Analytical Geometry 2D

You keep assuming the assertion must imply the reason - they are independent statements that can each be true on their own.

You answered 8% of these correctly on this test (6 attempts) - this pattern sits in a topic worth 12% of the NDA paper.

Coach's note

What happened

Speed was fine, accuracy wasn't. Geometry is where the marks leaked - both 2D and 3D went unanswered correctly. Calculus was closer than the score looks; those slips were silly mistakes, not gaps.

Patterns I see

Geometry is the leak
0 from 13 across 2D and 3D, and these carry heavy exam weight.
Negative marking bit hard
20 wrong at −0.83 each cost you 16.6 marks. Skip when uncertain.
Calculus slips are fixable
Most errors were sign and arithmetic, not concept gaps.

Do this next

Drill Analytical Geometry 2D

18 questions · about 18 minutes

Review the 20 wrong answers

Each one is filed with a worked solution

Take a full mock

120 questions · 2½ hrs · +2.5/−0.83

Free Mock · 27/7/2026 · Attempt #1

The loop-closer

Mistake sprint

Your 7 open mistakes, served fresh as a drill - explained after each one. Clear the notebook, keep the lesson.

3 of these are Matrices and Determinants.

10152030All

Start sprint

By topicNewest first

TopicAll topics

Matrices and Determinants

3 openDrill these

If A is a 3×3 matrix and det(A) = 5, then det(2A) equals:Free Mock · 27 Jul 2026Wrong

A10Your answer

B20

C40Correct answer

Why: For an n×n matrix A, det(kA) = kⁿ·det(A). With n = 3 and k = 2, det(2A) = 2³·5 = 8·5 = 40.

You scaled det by 2, but 2 multiplies every row, so it compounds three times.

If A and B are square matrices of the same order, then (AB)ᵀ equals:Free Mock · 27 Jul 2026Wrong

The rank of a 4×4 matrix with every entry equal to 1 is:PYQ practice · 25 Jul 2026Skipped

Analytical Geometry 2D

2 openDrill these

The angle between the lines y = 2x + 3 and y = −3x + 1 is:Free Mock · 27 Jul 2026Wrong

A45°Correct answer

B90°

C60°Your answer

D30°

Why: tan θ = |(m₁ − m₂)/(1 + m₁m₂)| = |(2 − (−3))/(1 + 2·(−3))| = |5/−5| = 1, so θ = 45°.

m₁m₂ lives in the denominator. The negative slope flips the sign and trips the formula.

The locus of the points equidistant from (3, 0) and (0, 3) is:Free Mock · 27 Jul 2026Wrong

Differential Calculus

2 openDrill these

If f(x) = x³ − 3x² + 2, the number of distinct real roots of f(x) = 0 is:Free Mock · 27 Jul 2026Wrong

B2Your answer

C3Correct answer

Why: f(1) = 0, so (x − 1) is a factor. The quotient x² − 2x − 2 has discriminant 12 > 0, giving two more real roots, three in total.

One rational root hid two irrationals. Finish the factorisation before you count.

The derivative of (ln x)² with respect to x is:PYQ practice · 24 Jul 2026Wrong

End testMock 1

1:47:23Questions7/120Submit

Question 7+2.5 · −0.83

If the determinant of the matrix [[3, 1], [2, 4]] is evaluated, its value is:

Matrices and Determinants · Medium

B10

C12

D14

Mark for reviewClear choice

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300 marks · 120 questions · 2½ hours · +2.5 / −0.83 · September 13

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