Question

Identify the missing numbers in the number tower given below.

• A. A=5, B=28, C=32
• B. A=4, B=15, C=18
• C. A=4, B=16, C=16
• D. A=4, B=16, C=32

Answer 1

The correct option is D A=4, B=16, C=32

In the number tower, the box on the top layer has the number equal to the sum of numbers on the two boxes immediately below it.

That means each box has a number which is a sum of the numbers on its two adjacent lower boxes.

For example,
11 has 7 and 4 below it.
Therefore,
we can write 11 = 7 + 4

Similarly, 14 has A and 10 below it.
So, 10+A=14
A=4


Since B has A and 12 below it,
Therefore,
12+4=16

B=16
and,
Since C has B and 16 below it,
Therefore,
16+16=32

C=32