Math, asked by sanskritibarbiegirl, 7 months ago

Q. 1 Solve the following –

(a) Write the first five odd multiples of 3.

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(b) Write the multiples of 13 which are greater than 50 but less than 100.

(c) Write all the factors of 18 and 78.

Q. 2 What is the prime factorisation of 610?

Q. 3 Find HCF of following numbers –

(a) 54 and 90

(b) 12, 28 and 64

(c) 200 and 600

Q. 4 Find HCF of following numbers –

(a) 12 and 35

(b) 15, 45 and 90

(c ) 250 and 350

Q. 5 If the 1 cm of 27 and 130 is 3510, what is their HCF?

Q. 6 The product of 1 cm and HCF of 2 nos is 720. If one of the number is 30, what is

the other number?

Q. 7 Think and answer –

(a) The smallest prime number.

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(b) The greatest prime number between 1 and 100

(c) The HCF of 6 and 7

(d) The smallest composite number

(e) The factors of 25.

(f) The sixth multiple of 7

(g) The greatest factor of 90.

(h)The 1 cm of 8 and 9.

(i) The prime factorisation of 18.

(j) The HCF of any 2 consecutive numbers.

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Answers

Answered by PerfectOnBrainly

191

Answer ( 1 ) :

a) = 3, 9, 15, 21, 27

b) = 52, 65, 78, 91

c) • Factors of 18 = 18, 9, 6, 3, 1.

• Factors of 78 = 78, 39, 26, 13, 6, 3, 2, 1.

Answer ( 2 ) :

610 = 2 × 5 × 61

Answer ( 3 ) :

a) = 18

b) = 4

c) = 200

Answer ( 4 ) :

a) = 1

b) = 15

c) = 50

Answer ( 5 ) :

H.C.F = 1

Answer ( 7 ) :

a) = 2

b) = 97

c) = 1

d) = 4

e) = 25, 5, 1

f) = 42

g) = 90

h) = 72

i) = 2 × 3 × 3

j) = 1

Note :

I can't understand the 6th Question Sorry.

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