New Mathematics for Class X>Chapter 1 - Number System>REVISION EXERCISE>Q 2

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10th CBSE

IMPORTANT

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Find the LCM of $336$ and $54$ by prime factorisation method.

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Important Questions on Number System

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10th CBSE

IMPORTANT

New Mathematics for Class X>Chapter 1 - Number System>REVISION EXERCISE>Q 3

The

HCF

and

LCM

of two numbers are

9 and 90

respectively. If one number is

18

, find the other.

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10th CBSE

IMPORTANT

New Mathematics for Class X>Chapter 1 - Number System>REVISION EXERCISE>Q 4

Show that every positive even integer is of the form

2 q

and that every positive odd integer is of the form

2 q + 1

, where

q

is some integer.

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10th CBSE

IMPORTANT

New Mathematics for Class X>Chapter 1 - Number System>REVISION EXERCISE>Q 5

In the adjoining factor tree, find the numbers $m, n$ :

Question Image

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10th CBSE

IMPORTANT

New Mathematics for Class X>Chapter 1 - Number System>REVISION EXERCISE>Q 6

Use Euclid's Division Algorithm to find

H . C . F .

of

870, 225

.

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10th CBSE

IMPORTANT

New Mathematics for Class X>Chapter 1 - Number System>REVISION EXERCISE>Q 7

Find the LCM and HCF of

120 and 144

by fundamental theorem of Arithmetic.

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10th CBSE

IMPORTANT

New Mathematics for Class X>Chapter 1 - Number System>REVISION EXERCISE>Q 8

In the adjoining factor tree, find the numbers $m, n :$

` Question Image `

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10th CBSE

IMPORTANT

New Mathematics for Class X>Chapter 1 - Number System>REVISION EXERCISE>Q 9

Without actually performing the long division, state whether

\frac{543}{225}

has a terminating decimal expansion or non terminating recurring decimal expansion.

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10th CBSE

IMPORTANT

New Mathematics for Class X>Chapter 1 - Number System>REVISION EXERCISE>Q 10

Use Euclid's Division Lemma to show that the square of any positive integer if of the form

4 m

or

4 m + 1

for some integer

m

.