70 POINTS FOR WHOEVER SOLVES THIS I WILL ALSO GIVE BRAINLIEST PLS HELP:(

Adrawer contains 12 identical white socks, 18 identical black socks and 14 identical brown socks. what is the least number of socks you must choose, without looking, to be certain that you have chosen two socks of the same colour?

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

Out of $20$ creepy-crawly creatures in a room, $80\%$ are flies and $20\%$ are spiders. if $s\%$ of the total legs belong to spiders, what is $s$?