MathDB

1

Part of 2021 MOAA

Problems(4)

Speed P1

Source:

10/16/2021
What is 2021+20+21+2+0+2+12021+20+21+2+0+2+1?
Proposed by Nathan Xiong
MOAA 2021speed
Accuracy P1

Source:

10/16/2021
Evaluate 2×(2×(2×(2×(2×(2×2−2)−2)−2)−2)−2)−2.2\times (2\times (2\times (2\times (2\times (2\times 2-2)-2)-2)-2)-2)-2. Proposed by Nathan Xiong
MOAA 2021Accuracy
Team Round P1

Source:

10/16/2021
The value of 120−121+120×21\frac{1}{20}-\frac{1}{21}+\frac{1}{20\times 21} can be expressed as mn\frac{m}{n} for relatively prime positive integers mm and nn. Compute m+nm+n.
Proposed by Nathan Xiong
MOAA 2021team
Gunga P1

Source:

10/16/2021
Evaluate 2×0+2×1+2+0×2+12\times 0+2\times 1+ 2+0\times 2 +1.
Proposed by Nathan Xiong
MOAA 2021Gunga