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Question

Which of the following options can complete the number tower.

A
30
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B
25
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C
20
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D
15
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Solution

The correct option is C 20
Adding two adjacent cells right below any cell gives the sum in the top cell.

For example as highlighted in the image below 1 + 2 = 3.



Similarly 8 + 12 = 20. Hence 20 is the missing number in the number tower.

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