Your classmate has something to buy. Lend it to them.

But how many answers can you remember?

17( 1949-2009)

58 (Find the number of tetrahedrons)

Thirty degrees (find the maximum difference between two angles)

Two-nineths times the root number six (find the volume)

870 (sum of set products)

Quadruple radical number two (minimum value)

The next big problem: the first one uses diagonal complementarity.

The second one doesn't understand.

Two thirds can't be achieved. The first inference attracted several Tu Tu, but I didn't understand it.

Strongman analysis: Although it is relatively simple to fill in the blanks, it is almost the same if all the blanks can be removed.

One big topic is worth two small topics. You do the math yourself.

Exact message

54 to enter the semi-finals

good luck