Father leaves home at 07:00 to take Lucy to school at 30 km/h. He arrives at 07:20 and immediately returns along the same route. Rain reduces his speed to two thirds of the original speed. When does he arrive home?
The source states: “The sum of three consecutive numbers is 111.” Fill the cell containing “?”.
Intended reading made explicit: the numbers in every three adjacent cells of this row have sum 111; “consecutive” refers to cell positions, not consecutive integers.
Jamie has three times as many shirts as pants. Kellie has twice as many pants as shirts. Together they have 17 clothing items. How many shirts do they have altogether?
The pie chart shows a clothing store’s sales in four weeks. Week 1 has the greatest sales, 1200 dollars. Week 2’s sales equal the sum of weeks 3 and 4. Find week 3’s sales, which are not the lowest.
A box has 3 red, 5 green, 4 blue, 6 yellow and 1 white ball. Suzy draws without looking and without replacement. What is the minimum number that guarantees she has balls of at least three different colours?
The balanced mobile contains five identical Candy boxes, one Cookie box and a 250-g weight. Find the Cookie box’s mass. Treat the beams and strings as weightless, with equal arms as shown.
A line contains 2022 people. Each is either a truth-teller, who always tells the truth, or a liar, who always lies. Every person says: “There are more liars in front of me than truth-tellers behind me.” How many truth-tellers are in the line?