Math hacks every student needs to know | Calculators not allowed!

[@Usershima-c4v]

2^40+2^20+1

[@gregevgeni1864]

Known identity. x⁵+x+1=(x²+x+1)(x³-x²+1) x=2²⁰

[@neerajgupta7856]

2power40+2power20+1