How we check every question
Every question passes four checks before a student sees it, and any error found afterwards is fixed within 48 hours and listed below.
Written by a maths expert
Original questions in the board's styles: multiple choice, assertion–reason, case study, very short, short and long answer. Never copied from textbooks or other sites. The questions are reviewed by Pete Bromfield, a practising maths examiner.
Solved again, independently
A second examiner-level solve of every question from the question alone, with every numerical answer checked by computer, every multiple-choice key and every assertion–reason verdict confirmed, and the step marks added up.
Matched to the syllabus
Topics deleted from the rationalised NCERT books are removed, and every question is tagged to its chapter and topic in the current CBSE curriculum.
Checked for originality
Anything too close to a textbook exercise or a past board question is rewritten, not just renumbered.
What the checks changed
Before publishing, the independent checks replaced or corrected 200 questions: 137 in Class 10 (121 replaced, 16 corrected) and 63 in Class 12 (53 replaced or rewritten, 10 corrected). Most replacements were questions judged too close to a textbook exercise, a past board paper or another question in the bank; the rest fixed a wording, a key or a mark total. The last full review was in September 2026.
Corrections log
Errors reported after publishing are corrected within 48 hours and listed here with the date, the question and what changed.
| Date | Question | What changed |
|---|---|---|
| No corrections reported since publishing. | ||
Found something? Use "Report a problem" in the menu, or email pbromfield@ibmathrevision.com.