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Q.

A boy has drawn a number card from a bag containing numbers from 1 to 100. He takes out a number from the bag which is 20 more than the smallest two-digit number. What is his number?


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a

30

b

60

c

45

d

55 

answer is A.

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Detailed Solution

Concept- Make the boy's chosen number a variable called x. Additionally, make use of the fact that 10 is the lowest two-digit natural number.
 As you can see, the term "number" in theseQuestions refers to natural numbers in their broadest sense. We can thus infer that the bag includes playing cards with the numbers 1 through 100 inscribed on them. A boy now chooses a card from among these numbers. Let x be the value of the card that was drawn.
The answer to theQuestion also states that the drawn number is 20 greater than the smallest two-digit natural number.
Now that we've given it some thought, we may conclude that the lowest two-digit natural number is 10. In light of this fact, we may formulate the following mathematical equation in terms of x:
drawn number = smallest two digit number Question ImageQuestion ImageQuestion ImageTherefore, we may conclude that the youngster selected the card with the number 30 printed on it from the pack of cards with numbers 1-100 printed on them.
Hence, the correct option is 1.
 
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