Have a look at this problem and see if you can pair the numbers up correctly.

Pair these ten numbers so that the difference between the two numbers in each pair is exactly divisible by 7.
6, 28, 58, 98, 78, 45, 83, 17, 64 and 37

For example, if you had the numbers 23 and 44 paired together the difference between them is 21. 21 divided by 7 is 3, no remainders.

Post your answers on the blog or come and see me with your solutions on Monday morning.