{"id":2505,"date":"2009-05-07T21:43:00","date_gmt":"2009-05-07T13:43:00","guid":{"rendered":"http:\/\/www.intmath.com\/blog\/?p=2505"},"modified":"2009-05-07T21:43:00","modified_gmt":"2009-05-07T13:43:00","slug":"average-speed-and-percentage","status":"publish","type":"post","link":"https:\/\/www.intmath.com\/blog\/mathematics\/average-speed-and-percentage-2505","title":{"rendered":"Average speed and percentage"},"content":{"rendered":"

This kind of puzzle always catch out students.<\/p>\n

\n

I travel to work at 30 km\/h, but on the way home there is less traffic so I can travel at 60 km\/h. What is my average speed?<\/p>\n<\/blockquote>\n

And the second one is also an old favourite.<\/p>\n

\n

I have a jar of water and I remove 10% of it. Then my friend comes along and increases the amount of water by 10%. Is there more, the same or less water in the jar than when we started?<\/p>\n<\/blockquote>\n

I'll offer a prize to the first correct answers with good reasoning. What prize? <\/p>\n

You will get a warm inner glow for having achieved something. \ud83d\ude42<\/p>\n

See the 10 Comments<\/a> below.<\/p>\n","protected":false},"excerpt":{"rendered":"

Here are 2 problems that are not what they seem at first.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mo_disable_npp":""},"categories":[4],"tags":[],"_links":{"self":[{"href":"https:\/\/www.intmath.com\/blog\/wp-json\/wp\/v2\/posts\/2505"}],"collection":[{"href":"https:\/\/www.intmath.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.intmath.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.intmath.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.intmath.com\/blog\/wp-json\/wp\/v2\/comments?post=2505"}],"version-history":[{"count":0,"href":"https:\/\/www.intmath.com\/blog\/wp-json\/wp\/v2\/posts\/2505\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.intmath.com\/blog\/wp-json\/wp\/v2\/media?parent=2505"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.intmath.com\/blog\/wp-json\/wp\/v2\/categories?post=2505"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.intmath.com\/blog\/wp-json\/wp\/v2\/tags?post=2505"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}