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ЭЕШ · SAT Math · AP Calculus · IB Math
Trusted by students preparing forЭЕШ·SAT Math·AP Calculus AB·AP Calculus BC·IB Math HL·IB Math SL
2,000+
test problems in our library
800
real ЭЕШ questions, 2024–2025
10,000+
AI-generated practice problems
Diagnostic

One test. A complete picture.

Every question you answer is tagged to a sub-topic, a cognitive skill, and an expected difficulty. We surface where you're losing points — not just that you lost them.

  • 01Official ЭЕШ tests, extracted & retagged to 84 sub-topics
  • 02Skill breakdown: computation, concept, application, trap avoidance
  • 03Time-per-question flagged against 95th-percentile pacing
Topic heatmap
84 SUB-TOPICS · ЭЕШ 2024
Weak
Strong
TIME/Q
1:42
ACCURACY
78%
PERCENTILE
P84
Score prediction

ЭЕШ score, before exam day.

Our model translates your practice performance into an estimated ЭЕШ score with a 2σ confidence band. Watch it tighten as you study.

  • 01Calibrated on 12 years of ЭЕШ outcomes
  • 02Updates after every practice test
  • 03Exports to your tutor for session planning
Projected ЭЕШ · 8 weeks
tracking
800720640560TARGET 780W1W3W5W7NOWEXAM
AI problem generator

Infinite practice, on the topics that matter.

Generate 3–5 new problems on any weak topic, with step-by-step solutions explained at a fifth-grader level. Upload your own work for step-by-step feedback.

  • 01Topic-constrained generation, seeded from real ЭЕШ patterns
  • 02Photograph handwritten solutions for per-step feedback
  • 03Explanations in Mongolian or English
Definite integration
LIVE
PROBLEM 02 / 05
If f(x) = 2x·cos(x²), ∫₀^√π f(x)dx — find.
Step-by-step (5th-grade level)
01
Notice 2x is the derivative of x². Substitute u = x².
02
du = 2x dx, so ∫cos(u) du from 0 to π.
03
= sin(π) − sin(0) = 0.
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1,842
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NORTH AMERICA
486
students · SAT + AP
EUROPE
312
students · IB HL/SL
ASIA-PACIFIC
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