Find the missing number 15-40-30-20-

The correct option is C 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 ...

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Byju's Answer

Standard IV

Mathematics

Patterns and Mathematics

Find the miss...

Question

Find the missing number

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Solution

The correct option is D
30

For the first two rows:

$8 \div 4 = 2$ and $24 \div 8 = 3$

$6 \div 3 = 2$ and $18 \div 6 = 3$

So, we observe that in a row:

Number in the second column = 2 $\times$ Number in the first column

Number in the third column = 3 $\times$ Number in the second column

So, 2 $\times$ 5 = 10 and 3 $\times$ 10 = 30

Hence, the missing number is 30.

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