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Everyone loves securing a bargain and getting money off their holiday, and now there's a chance to do just that - although it involves answering a tricky GCSE-style maths question.
Only eight per cent of adults have managed to get the puzzle right, according to On The Beach's research.
While a whopping 66 per cent admitted they didn't know the answer, 26 per cent tried to have a go but got it wrong.
The offer is open to holidaymakers who are planning a trip during the three weeks from June 26, when the exam season ends, until the start of the summer holidays.
If correct, they'll bag £50 off a break during that time period.
On The Beach's GCSE-style maths question could bag you £50 off your holiday if you're jetting off between June 27 and July 17
The tricky question that only 8 per cent of adults surveyed managed to get correct
The question reads: 'Raul is selling ice cream. He makes three types of ice cream. number of vanilla: number of chocolate: number of banana = 2 : 3 : 5
'He makes 20 banana ice creams. Raul spends €50 on all the ingredients to make the ice cream.
'40% of the banana ice creams melt and cannot be sold. Raul sells all the other ice creams for €3 each.
'Work out Raul's percentage profit.'
Those smart enough to work out the answer can submit it to On The Beach's website.
Entries are now open and close on June 26. The voucher must be redeemed by July 12 for travel departing and returning between June 27 and July 17.
Caspar Nelson, holiday expert at On the Beach, said: 'Parents spend years telling their kids to revise for GCSE maths, only to discover they can't answer the questions themselves without opening three tabs, finding a calculator and having a minor breakdown.
'But if they can crack it, they could bag £50 off a family holiday during that sneaky little GCSE window when prices are lower, airports are quieter, and everyone else is still stuck in school.
'Or, better yet, just hand the question to your teenager and pretend you're 'testing their revision' while they earn the discount for you.'
Earlier this month, On The Beach revealed it would give travellers their money back the very same day if their flight is cancelled this summer.
The new 'Cancelled Flight Cover' policy will be standard across all of the packages sold by the company.
It will mean On the Beach processes refunds immediately, ensuring customers get their money back the same day, allowing them to make new plans.
The speed of the refund is dependent on the customer's bank, however.
Other holiday providers do currently provide refunds, but it may take up to 14 days for customers to get their money back, leaving them out of pocket and without a holiday booking.
Under the new initiative, if a holidaymaker finds their flight is cancelled, On the Beach will find an alternative flight or offer a full refund for the entire holiday.