How do you get 24 from 9, 6, 11 and 3 using addition, subtraction, multiplication or division?
There are multiple solutions.
(6 – 3) × 11 – 9
(11 – 6) × 3 + 9
(9 – 6) × (11 – 3)
There are multiple solutions.
(6 – 3) × 11 – 9
(11 – 6) × 3 + 9
(9 – 6) × (11 – 3)
You are given the numbers 777, 888 and 999. Using the numbers once and adding, subtracting, multiplying or dividing, how can you make 999?
(7 x 7 x 7) + (9 x 9 x 8) + ((9 – 8) x 8) = 999
If other operators were allowed, another solution would be 999 modulo (888 x 777). I’m sure there are more solutions.
(7 x 7 x 7) + (9 x 9 x 8) + ((9 – 8) x 8) = 999
If other operators were allowed, another solution would be 999 modulo (888 x 777). I’m sure there are more solutions.
What word can be added before or after these words to make a new word or phrase?
Area, Death, Kick
Penalty. Penalty area, Death penalty, Penalty kick.
Penalty. Penalty area, Death penalty, Penalty kick.
Tabitha is 13 years old. Her father Ronan is 40 years old. How many years ago was Ronan four times as old as Tabitha?
Four years ago, when Tabitha was 9 and Ronan was 36 (9 × 4 = 36)
Four years ago, when Tabitha was 9 and Ronan was 36 (9 × 4 = 36)
It walks on four legs in the morning, two legs at noon and three legs in the evening. What is it?
Man (or woman). A baby crawls on all fours, then walks on two legs as an adult and uses two legs and a cane when they’re old.
Man (or woman). A baby crawls on all fours, then walks on two legs as an adult and uses two legs and a cane when they’re old.
How much does a bottle of wine weigh if it is 1 kilogram plus half its own weight?
2 kg.
If we let half of the bottle’s weight be “n”, then we get the following equation: n/2 + 1kg = n (the bottle’s weight).
Solve for n:
2 kg.
If we let half of the bottle’s weight be “n”, then we get the following equation: n/2 + 1kg = n (the bottle’s weight).
Solve for n:
Look in my face and I am someone,
What am I?
A mirror. The face of a mirror shows your face, but the back of a mirror shows nothing but dust and cardboard (depending on the type of mirror).
A mirror. The face of a mirror shows your face, but the back of a mirror shows nothing but dust and cardboard (depending on the type of mirror).
I have nine matchbox sticks and would like to make ten. How do I do it?
Arrange the nine matchbox sticks like so to make the shape of the number ten:
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Arrange the nine matchbox sticks like so to make the shape of the number ten:
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I belong to you, but am used more by others.
What am I?
Your name. It could also be your phone number.
Your name. It could also be your phone number.
Four cards are placed in front of you on the table, each with a number on one side and a color on the other. The visible cards show 3, 8, red and brown. Which cards should you turn over in order to test the truth of the statement that if a card shows an even number on one face, then its opposite face is red?
You’d need to turn over only the 8 and brown card. Only a card with an even number on one face and which is not red on the other face can invalidate the stated rule. If you turn over the 3 card and it’s not red, it doesn’t invalidate the rule, nor does turning over the red card and finding it has the label 3.
This test was devised by Peter Cathcart Wason and is known as the Wason selection task . Less than 10% of test subjects got it correct in two separate studies.
You’d need to turn over only the 8 and brown card. Only a card with an even number on one face and which is not red on the other face can invalidate the stated rule. If you turn over the 3 card and it’s not red, it doesn’t invalidate the rule, nor does turning over the red card and finding it has the label 3.
This test was devised by Peter Cathcart Wason and is known as the Wason selection task . Less than 10% of test subjects got it correct in two separate studies.
