Choose two digits and arrange them to make two double-digit
numbers. Now add your double-digit numbers. Now add your single
digit numbers. Divide your double-digit answer by your single-digit
answer. Try lots of examples. What happens? Can you explain it?
When asked how old she was, the teacher replied: My age in years is
not prime but odd and when reversed and added to my age you have a
Can you work out how many of each kind of pencil this student
How many grains of rice would there be on the 8th
How many grains would you need altogether in order to
fill up to the 15th square?
Estimate how many grains you would need in total to
fill the entire board in this way. Explain your thinking.
Perhaps Sissa was cleverer than the king thought!