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The easiest way to do the first question is to times 5 by 6. This equals 30 and as the 6 times table doesn't have any numbers ending in 5 in it or any numbers ending in 0 below 30,then it's the lowest number that fills the criteria. I realised that 60,90 and 120 were also answers. I then noticed that there was a pattern:all the numbers that filled the criteria were multiples of 30.

For the second question, I did 4X5X6=120. Because I know my times tables, I worked out that 60 would also work as an answer. I quickly worked out that 60 was the lowest number possible to get that fitted the criteria. I noticed that all the multiples of 60 worked as well e.g. 120,180,240