Question 121
2. Powers of 2 - Calculate:
a) $1678^{2}-1677^{2}$
b) $1001^{2}+1000^{2}$
c) $19999^{2}$
d) $2001^{2}+2002^{2}+2003^{2}$
a) $1678^{2}-1677^{2}$
b) $1001^{2}+1000^{2}$
c) $19999^{2}$
d) $2001^{2}+2002^{2}+2003^{2}$
MathNet 2026 — Part 01 Question 121
Math Olympiad Vault · MathNet 2026 — Part 01