Brain-Teasers

The car traveled as many kilometers during the first part of the trip as the number of minutes it took to cover the rest of the trip. The car covered the rest of the trip in as many minutes as the number of kilometers it traveled during the first part of the trip. Determine the car’s speed. Write your answer in km/h.

One day, a family was celebrating a relative’s birthday. The party was attended by: 2 fathers, 2 mothers, 1 grandmother, 3 grandchildren, 2 sons, 2 daughters, 1 brother, 2 sisters, 1 father-in-law, 1 mother-in-law, 1 daughter-in-law, and 4 children. How many people are there in the family in total?