Two players are playing the following combinatorial game.
• On each turn they put a chess knight on a board 9 × 9 so that it is not attacked by previously placed knights.
• The take turns and the player that cannot make a move loses.
Determine who has a winning strategy.

The player that placed the knight after the first person at the start of the game. There in his turn whatever role the knight played he both had opportunity to space each knight strategically and use the knight to protect whatever wins the game.

Step-by-step explanation:

Maths is 81/80 =1

answer: for each 3 girls there is 2 boys . 3: 2

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answer: the answer is (b) amie should have multiplied

step-by-step explanation: given a sphere and a cylinder with same radius and height.

let, 'r' be the radius of the cylinder and sphere and 'h' be the height of the cylinder. according to the question,

r = h.

now, the volume of the sphere will be

and the volume of the cylinder will be

therefore, we have

thus, ammie should have multiplied the volume of the sphere