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Class 9 · Ganita Manjari · Unit 5: I'm Up and Down, and Round and Round

Modular Arithmetic

Lesson 2 of 4
'Clock arithmetic'. 17mod  12=517 \mod 12 = 5 (17:00 hours = 5 PM). Applications: calendars, cryptography, error detection.
Gyaan Maths — CBSE Class 6-12, built for board-toppers.
v1.1 · Sept 2026