START UP MATHEMATICS>Chapter 3 - Playing with Numbers>SOME NCERT TEXTBOOK QUESTIONS>Q 8

MEDIUM

6th CBSE

IMPORTANT

Earn 100

Here are two different factor trees for $60 .$ Write the missing numbers.

Important Questions on Playing with Numbers

HARD

6th CBSE

IMPORTANT

START UP MATHEMATICS>Chapter 3 - Playing with Numbers>SOME NCERT TEXTBOOK QUESTIONS>Q 9

HCF of co-prime numbers $4$ and $15$ was found as follows by factorization:

$4 = 2 \times 2$ and $15 = 3 \times 5$ since there is no common prime factor, so HCF of $4$ and $15$ is $0$ . Is the answer correct? If not, what is the correct HCF?

HARD

6th CBSE

IMPORTANT

START UP MATHEMATICS>Chapter 3 - Playing with Numbers>SOME NCERT TEXTBOOK QUESTIONS>Q 10

The length, breadth and height of a room are

825 cm

,

675 cm

, and

450 cm

respectively. Find the longest tape which can measure the dimensions of the room exactly.

MEDIUM

6th CBSE

IMPORTANT

START UP MATHEMATICS>Chapter 3 - Playing with Numbers>SOME NCERT TEXTBOOK QUESTIONS>Q 11

Find the least number which when divided by

6, 15

and

18

leave the remainder

5

in each case.

HARD

6th CBSE

IMPORTANT

START UP MATHEMATICS>Chapter 3 - Playing with Numbers>EXEMPLAR PROBLEMS>Q 1

The number of distinct prime factors of the smallest $5$ -digit number is:

HARD

6th CBSE

IMPORTANT

START UP MATHEMATICS>Chapter 3 - Playing with Numbers>EXEMPLAR PROBLEMS>Q 2

The number

7254 * 98

is divisible by

22

, the digit at

*

is:

MEDIUM

6th CBSE

IMPORTANT

START UP MATHEMATICS>Chapter 3 - Playing with Numbers>EXEMPLAR PROBLEMS>Q 3

A number is divisible by

5

and

6

. It may not be divisible by:

HARD

6th CBSE

IMPORTANT

START UP MATHEMATICS>Chapter 3 - Playing with Numbers>EXEMPLAR PROBLEMS>Q 4

If LCM of two numbers is

180

, then which of the following is not the HCF of the numbers?

HARD

6th CBSE

IMPORTANT

START UP MATHEMATICS>Chapter 3 - Playing with Numbers>EXEMPLAR PROBLEMS>Q 5

If a number divides three numbers exactly, it must divide their sum exactly.