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Question

Find the missing number


A

15

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B

40

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C

20

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D

30

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Solution

The correct option is D

30


For the first two rows:

8÷4=2 and 24÷8=3

6÷3=2 and 18÷6=3

So, we observe that in a row:

Number in the second column = 2 × Number in the first column

Number in the third column = 3 × Number in the second column

So, 2 × 5 = 10 and 3 × 10 = 30

Hence, the missing number is 30.


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