Rich T. provides a plate of biscuits for three of his friends to take with their cups of tea. The first friend takes half the biscuits plus half a biscuit. The second friend takes half the remaining biscuits plus half a biscuit. The third friend then takes half the remaining biscuits plus half a biscuit. Rich T. notes that the plate is now empty. How many biscuits were originally on the plate?
Puzzle 2
A recipe for biscuits requires an accurate measure of 4 units of milk, but only a 3 unit measure and a 5 unit measure are available. How can 4 units be achieved using only these two measures?
Puzzle 3
Arrange 16 identical biscuits to form a square with 6 biscuits on each side.
A lorry leaves its depot and travels at constant speed to its destination. If it travels at 30 mph it arrives at 11:00 - if it travels at 20 mph it arrives at 13:00. What speed must it travel at to arrive at 12:00?
A ship is twice as old as its engine was when the ship was as old as the engine is now. How old are the ship and its engine if their ages sum to 21 years?
Arrange 10 identical biscuits in 5 rows with 4 biscuits in each row
Find the missing word in the sequence: thorn, stew, seat, .......
What is the missing number in the following sequence?
4 |
5 |
6 |
7 |
8 |
9 |
61 |
52 |
63 |
94 |
46 |
? |
What is the missing number in the following sequence?
1, 3, 5, 7, 8, 10, ?
Puzzle 1: 7 biscuits
Puzzle 2:
1) Fill the 5u measure, and from it fill the 3u measure thus leaving 2u in the 5u measure.
2) Empty the 3u measure, then transfer the 2u from the 5u measure to the 3u measure.
3) Fill the 5u measure then from it fill the 3u measure. (this requires 1u to fill thus leaving 4u in the 5u measure)
Puzzle 3: arrange 12 biscuits to form a square with 4 on each side, then place an extra biscuit over each corner biscuit
Puzzle 4: 24 mph
Puzzle 5: Ship=12, Engine=9
Puzzle 6: arrange the biscuits in a 5 pointed star (pentagram)
Puzzle 7:"shout" - they are all anagrams of points of the compass
Puzzle 8: 18. The lower numbers are the square of the upper numbers with the digits reversed
Puzzle 9: 12. They are the numbers of the months containing 31 days