Each of the numbers 1 to 9 is placed in a cell of a 3 by 3 grid, such that the sum of the numbers in each row, column and diagonal is exactly the same.
Which number should be in the middle cell?
Steve and Benjamin are father and son.
The sum of their ages right now is 46. Two years ago, Steve's age was five times his son's age.
How old will Steve be when he is three times his son's age?
Treetops Elementary School needs to build a wall around a certain field. The school hires three workers to build it.
If Adam worked alone, he would take 8 hours to build the wall. If Betty worked alone, she would take 8 hours as well. Charlie would take 6 hours if he worked alone.
If all three work simultaneously, and they start building the wall at 10:00 am, at what time do they finish? (Assume that they all work at a constant rate)
Eight people work at a certain office. One celebration, the company organises a gift exchange.
The eight people are divided into pairs, and each person buys a gift for the person they are paired with.
In how many different ways can the people be split into pairs?
On Sunday 25th December 2019, Jack celebrates his sixteenth birthday. What day was Jack born on?
HINT: We sometimes leap for joy!
A surveyor is going around houses to collect some information from the government.
At one house, he meets a woman who has three children, and he asks her for the ages of the children.
The woman replies - The product of their ages is 36, and all three have integer ages. I would give you the sum of their ages, but it wouldn't help you.
The surveyor responds - "I still don't know their ages".
The woman tells him that her oldest child just started taking piano lessons.
What is the difference between the ages of the oldest and youngest child?
During September, the number of leaves falling from a certain tree increases by a constant quantity each day.
On 1st September, 2 leaves fell from the tree and on 5th September, 30 leaves fell from the tree.
How many leaves fell from the tree during the whole of September?
Jesmin reaches a restaurant at 1 o'clock. She collects her food and leaves shortly after.
As she leaves, she notices the acute angle between the hour and minute hands on the clock is 80O.
If she waited for double the time to collect her food, what would the magnitude of the obtuse angle between the clock hands be?