Saturday

American English and British English

(without a 'u')
usa us american
(with a 'u')
uk british
colorcolour
favorfavour
flavorflavour
odorodour
humorhumour
rumorrumour
honorhonour
laborlabour
harborharbour
neighborneighbour
parlorparlour
vigorvigour
rigorrigour
demeanordemeanour
moldmould
saviorsaviour
clamorclamour
sulfursulphur
tumortumour
vaporvapour

Wednesday

math & palindrome

111,111,111 x 111,111,111 = 12,345,678,987,654,321

mathematics math palindrome