Maths puzzles

MAKE A NUMBER CHALLENGE

Rules: You may use some or all of the given numbers to make the challenge number using any of the following symbols: (+- /×)
You may use each symbol any number of times.
You can only use each number once.
You do not have to use all the numbers.

Example: Make 470 using 50, 8,5,4,2,1.

You should know that 5 × 9 = 45,
so 50 × 9 = 450
is a good starting point.

Now all that you need to do is to make 9 which could be 5 + 4 or 8 + 1 and then add 20.

Therefore use 8 + 1 for the 9
and 5 × 4 for the 20.

Answer: 50×(8+1) + 5×4
= 50 × 9 + 20
= 450 + 20
= 470
Now try this one:

Make 474 using 100, 1, 2, 5, 7, 8.

How many different ways can you do it?
e-mail answers to abell@arnoldschool.com

Number challenge No 2

Use 50, 1, 2, 3, 5, 6 to make 269.

BACK TO FRONT

I have a 6 digit number starting with a 1.

If I move the 1 to the end, the new number is three times the number that I started with.

What is the original number?

E-mail solutions to abell@arnoldschool.com by the October half term.
Solution next half term and a new puzzle.

Make a Number Puzzle number 3

Make 790 using 100, 2, 3, 4, 6 and 9.

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