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Q.

How many numbers from 1 to 100 are there, each of which is not only exactly divisible by 4 but also has 4 as a digit ?


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a

    7

b

    10

c

    20

d

    12 

answer is A.

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Detailed Solution

It is given numbers from 1 to 100.
Therefore,
The numbers from 1to 100 which are exactly divisible by 4 are,4,8,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68,72,76,80,84,88,92,96,100.
According to question,
Each number should have 4 as its digit.
So, the required numbers are 4,24,40,44,48,64,84.
Clearly, there are 7 such numbers.
Therefore, there are 7 numbers from 1to 100 each of which is not only exactly divisible by 4but also has 4as a digit.
Hence, the correct option is 1.
 
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How many numbers from 1 to 100 are there, each of which is not only exactly divisible by 4 but also has 4 as a digit ?