Home Forum Chat Forum KS2 maths question – Any maths teachers in?

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• KS2 maths question – Any maths teachers in?
• dawson
Subscriber

My 11yr old daughter is practicing for upcoming SATS.

Maths was never my strong point…

The question causing bother;

“In a class, 18 of the children are girls. A quarter of the children in the class are boys.

Altogether, how many children are in the class?”

What say you STW?

(I have the marking scheme)

garage-dweller
Subscriber

If one quarter are boys
Then three quarters are girls
One quarter is therefore six
Four quarters (ie the whole) is 24

Or 18 x 4 / 3

i_like_food
Subscriber

Assuming there are no trans-gender children in the class, if 18 are girls this represents 3/4 of the class (since the other 1/4 are boys).

18 divided by 3 is 6. So 1/4 of the class represents 6 kids.

So 6*4 gives 4 quarters or the whole. The class is 24 kids.

24 isn’t it? a quarter of the class are boys so 3/4 are the 18 girls so a quarter is 6.

footflaps
Subscriber

Garage-dweller +1

mogrim
Member

Using an equation (not sure if she does those):

3x/4 = 18

3x = 18 * 4

x = (18 * 4) / 3

dawson
Subscriber

@mosey – thats what I thought too ðŸ˜†

@gd – yep, answer given is 24, though whether my daughter could have worked it out like that is a different matter!

dawson
Subscriber

thanks all!

I’m glad we settled that, but more importantly what sort of classroom has 18 girls and only 6 boys? Some real gender diversity issues going on there. And it couldn’t be an inner city government school, could it? Never seen one with less than 30 kids in it. Bloody outrage!

totalshell
Subscriber

my dd class at primary school has had as few as six girls due to the arrival of twins there are now eight of them.. 24 boys though tends to unbalance things usually 3 adults required to ‘manage’ the class plus one lad is especially disruptive so has a permanent social worker with him..

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