Some tricky questions

[aaman1]

Can someone help me with these questions

The normal price of a motor cycle is £8600. Mr Taylor gets a discount of £1290. What is the percentage discount that Mr Taylor gets?
Answer is 15%

John and Ali start counting on from 0.
They each count on in steps of a different size.
The first number that both John and Ali reach is 120. What size steps could they have been counting in?

10 and 12
11 and 13
9 and 14
8 and 15
6 and 20

answer is 8 and 15

thanks

[Belinda]

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[aaman1]

Thank you so much............