Finding the Unknown — Formula Sheet
CBSE · Class 7 · Mathematics
8 formulas from Finding the Unknown (CBSE Class 7 Mathematics) on one page, grouped by topic. Part of the CBSE Class 7 Mathematics syllabus.
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Formulas and Key Relations
Matchstick Pattern
Matchstick sequence nth term: 2n + 1
Word Problems with One Unknown
Tile arrangement at Step k: 3k + 1
Cost incurred for Madhubanti's party (Mahesh's method): 25p + 50 = 500
Cost incurred for Madhubanti's party (Srikanth's method): 25 (f + 5) = 450
Jahnavi's savings after m months: 4000 + 650 m
Sunita's savings after m months: 5050 + 500 m
Key relations
Using this, 2n + 1 = 99 gives n = 49.
For 2n + 1 = 99, n = 49 works.
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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