Home
Class 8
MATHS
Rahul wanted ot type the first 180 natur...

Rahul wanted ot type the first 180 natural numbers. Find the number of times he had to press the numbered keys.

A

384

B

433

C

416

D

448

Text Solution

Verified by Experts

The correct Answer is:
B
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • REAL NUMBERS AND LCM AND HCF

    PEARSON IIT JEE FOUNDATION|Exercise level -4|1 Videos

  • REAL NUMBERS AND LCM AND HCF

    PEARSON IIT JEE FOUNDATION|Exercise level -5|1 Videos

  • REAL NUMBERS AND LCM AND HCF

    PEARSON IIT JEE FOUNDATION|Exercise Level -2|18 Videos

  • RATIO, PROPORTION AND VARIATION

    PEARSON IIT JEE FOUNDATION|Exercise CONCEPT APPLICATION|60 Videos

  • SETS

    PEARSON IIT JEE FOUNDATION|Exercise CONCEPT APPLICATION (LEVEL 3) |8 Videos

Similar Questions

Explore conceptually related problems

Roshan wanted to type the first 190 whole numbers. Find the number of times he had to press the numbered keys.

Roshan wanted to type the first 190 whole numbers.Find the number of xx he had to press the numbered keys.

Knowledge Check

  • Rahul wanted to type the first 180 natural numbers. Find the number of times he had to press the numbered keys.

    A
    384
    B
    432
    C
    416
    D
    448

  • Allok wanted to type the first 200 natural numbers. How many times does he have to press the keys?

    A
    400
    B
    365
    C
    492
    D
    489

  • In a set of first 180 natural numbers find the number of prime numbers.

    A
    A)48
    B
    B)24
    C
    C)41
    D
    D)38

    • Similar Questions

    Explore conceptually related problems

    Find the mean of the first 10 natural numbers.

    Find the mean of the first 10 natural numbers .

    Find the sum of the first 20 natural numbers.

    Find the sum of the first 50 natural numbers.

    In a set of first 180 natural numbers find the number of prime numbers.

    Home
    Profile