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Last updated 3 September 2026

Email: thangaraj4545@gmail.com
Address: India
Hours: Monday to Saturday, 9am to 7pm IST

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Write to us about anything: a paper that came out wrong, a chapter you need, a payment question, or which class we should build next. We answer within 2 working days, and usually the same day.

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If a paper looks wrong, send the paper's number from your History page. It tells us exactly which questions were drawn and saves a round of email.

Reaching us

Write to thangaraj4545@gmail.com.