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lapo4ka [179]
3 years ago
6

Here are five number cards. 2 5 7 8 9 One of the cards is removed and the mean average of the remaining four number cards is 6.

Which card is removed? You must show your working. Note:Please make sure your final answer says card...
Mathematics
1 answer:
Lubov Fominskaja [6]3 years ago
7 0

Answer:

Card 7

Step-by-step explanation:

2+5+7+8+9 =31

Multiples of 6: 6, 12, 18, 24, 30

31-9=22, No

31-8=23, No

31-5=26, No

31-2=29, No

31-7=24, Yes

The only way to get a multiple of 6 is to subtract card 7, so card 7 is the answer.

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