A tough challenge asks the sharpest minds to solve four brainteasers in a minute. The first teaser asks people to spot seven hidden dogs in a park, but the question remains, will you be able to tackle it? The teaser is created by Spin Genie and 38 per cent took more than 30 seconds to see the hidden pooches while 15 per cent took over a minute. Many of the animals will, be seen immediately, but some are are hidden against a brown backdrop.. If you are struggling examine the tree line in the