Question

There are red flowers and white flowers in the garden. Every fourth flower is red and every seventh flower is white.
So, the missing number is .

• A. 18
• B. 35
• C. 20
• D. 22

Answer 1

The correct option is C 20

The rule says every fourth flower is in red in color.
So, the pattern for red flowers increases in $4{}^{\prime }s$.

Now, from the number line, we can see that the number of red flowers increases by 4 for every step jumped.
4 + 4 = 8
8 + 4 = 12
12 + 4 = 16

∴ The next number when red flower appears will be 16 + 4 = 20.
From the number line also, we can see the following:

So, the missing number will be $20$.