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1 tonne = __ kg
1000
1001 prime factorisation:
7 × 13 × 11
10101 prime factorisation
3 × 7 × 13 × 37
(x/n) / (y/n)
x/y
Surface area of a sphere
4 pi r²
Curved surface area of a cone
pi r l
nCr
n! / (r! (n-r)!)
Binomial series

Loga x
Logb x / Logb a
Arithmetic series
s = 0.5n [2a+ [n-1]d]
Binomial series

Sum of geometric series
a(1-r^n)/(1-r)
Sum to infinity of geometric series when
log a + log b
Logab
Log a - log b
Log a/b
Transformer equ
n_p / n_s = V_p / V_s