Bissoy.com
Doctors Medicines MCQs Q&A

If Reena writes all integer numbers from 1 to 100, how many times does she write seven?

If Reena writes all integer numbers from 1 to 100, how many times does she write seven? Correct Answer 20

The total numbers from 1 to 100 are given below:

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100

according to the questions,

She writes seven.

So the number would be : 7, 17, 27, 37, 47, 57, 67, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 87, 97 = 19 total numbers but + 1 because 7 is written twice in number 77.

Thus the Reena write seven 20 times. 

Hence, the correct answer is "20".

Confusion Points

In the question it is asked how many times does she write 7.

We can see in number 77 she has written 7 twice. so we will not count it as one. 

Related Questions

Simplify the value of $$\frac{{{\text{0}}{\text{.9}} \times {\text{0}}{\text{.9}} \times {\text{0}}{\text{.9 + 0}}{\text{.2}} \times {\text{0}}{\text{.2}} \times {\text{0}}{\text{.2 + 0}}{\text{.3}} \times {\text{0}}{\text{.3}} \times {\text{0}}{\text{.3}} - {\text{3}} \times 0.9 \times {\text{0}}{\text{.2}} \times {\text{0}}{\text{.3}}}}{{{\text{0}}{\text{.9}} \times {\text{0}}{\text{.9 + 0}}{\text{.2}} \times {\text{0}}{\text{.2 + 0}}{\text{.3}} \times {\text{0}}{\text{.3}} - 0.9 \times {\text{0}}{\text{.2}} - {\text{0}}{\text{.2}} \times {\text{0}}{\text{.3}} - 0.3 \times 0.9}} = ?$$
$$\frac{{38 \times 38 \times 38 + 34 \times 34 \times 34 + 28 \times 28 \times 28 - 38 \times 34 \times 84}}{{38 \times 38 + 34 \times 34 + 28 \times 28 - 38 \times 34 - 34 \times 28 - 38 \times 28}}$$            is equal to = ?
Two friends- Seema and Reena go for morning walk for one month. The weight of Seema was 15 kgs more than Reena one month ago but the weight of Reena was 5 kgs more than the weight of Seema after one month. After a month, by what amount did the average weight of Reena got reduced when compared to Seema?
Deepak is brother of Ravi. Reena is sister of Atul. Ravi is son of Reena. How is Deepak related to Reena ?
Reena and Shaloo are partners in a business, Reena invest Tk. 35,000 for 8 months and Shallo invest Tk. 42,000 for 10 months. Out of a profit of Tk. 31,570, Reena's share is:
If Sunitha is taller than Seema and Reena. Reena is shorter than Radha and Gori. Bina is taller than Radha and shorter than sunitha. Sunitha is not the tallest and Reena is not the shortest then who is the tallest?
Pointing to a picture Reena told Vignesh, “Her only sibling's wife is the only daughter-in-law of my only brother’s mother’s husband.” How is the person in the picture related to Reena, if Reena's father has only two child?
Consider the following three pieces of information: (i) Geeta and Sita are of same age. (ii) Total age of Geeta, Reena and Sita is 88 years. (iii) Reena' age is same as the sum of Geeta and Sita's age. What is the age of Reena?
Regha is the mother of Arun and Priya. Ram is Regha’s brother. Reena has a daughter named Reetha. Reena is Ram’s sister. If Priya is the niece of Reena and Arun is the nephew of Ram, then what is Reetha’s relation with Regha?
Rajesh along with Reena accepted the order to prepare x number of dresses. For the order, 44.44% of the material is prepared by Reena and rest is prepared by Rajesh. It is found that 14.29% of dress prepared by Reena is defective and for Rajesh, the number is 16.67%. If one of the dresses had been picked up from the bunch, what is the probability that it is prepared by Rajesh and it is in good condition?