# Maths problem intended for primary students leaves parents baffled

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A homework query meant for eight-year-old college students has left grown adults scratching their heads.

Mumsnet customers have been making an attempt to resolve a riddle that asks when completely different lighthouses will shine their lights on the similar time and when they are going to be off on the similar time.

The query is answered by figuring out the frequent multiples between the schedules of the lighthouses.

Nonetheless, not one of the mother and father may appear to agree on the right reply – so can you’re employed it out?

Mumsnet customers have been left stumped by this maths query geared toward main college age kids – however are you able to clear up it?

It was shared by LucysMam, who stated she was struggling to assist her daughter together with her homework

The query has been branded ‘ridiculous’ by mother and father, who stated it was too laborious for 12 months 4 college students to work out.

The puzzle reads:  ‘On the coast there are three lighthouses.

‘The primary mild shines for three seconds then it’s off for 3 seconds. The second mild shines for four seconds then it’s off for four seconds. The third mild shines for five seconds then it’s off for five seconds. All three lights have simply come on collectively.

‘When is the primary time that every one three of the lights will likely be off collectively?

‘When is the subsequent time that every one three lights will come on at precisely the identical second?’

The primary a part of the query may be best labored out by writing out each time they had been off after which discovering out after they had been off on the similar time

Because the the primary mild comes on each 6 seconds, the second each eight, the third each 10 you need to work out the bottom quantity that may be divided by all these numbers for query two

The query was shared by a consumer referred to as LucysMam, who requested different mother and father on the thread to assist her together with her daughter’s homework.

However the query left the message board divided, and customers could not agree on a solution.

Although the consensus stated the answer was that the lights can be off collectively at six seconds, and they might come on collectively at 120 seconds.

The issue is best labored out by writing out each time they had been off after which discovering out after they had been off on the similar time.

The issue was criticised by different customers, who stated it was a lot too tough for main college kids

Others had completely different options, however they had been shut down by different mother and father who stated they had been too sophisticated

Because the the primary mild comes on each 6 seconds, the second each eight, the third each 10 you need to work out the bottom quantity that may be divided by all these numbers – and the reply for the second query is 120.

The query left many mother and father baffled as they could not even start to work out what the reply was.

One stated: ‘That could be a ridiculous query and I”m solely right here to be taught one thing.’

‘Bleurgh my dd can also be in ks2 and generally I simply googled the homework lol,’ one other stated.

A 3rd stated: ‘You girls are complicated me.’

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