Question

Write true and false. (4)

(a) 7x11x23 is even number. (b) 7x1x23 is. prime number.

(c) HCF of 4,20 and 130 is 10.​

Answer 1

Answer:

a] False, product of odd no. is always odd.

b] False, it has factors more than 2.

c] False, 4 has only 2x2 as its factors, so 10 can't be its HCF.

This is your answer.

Plz mark me brainliest...

Answer 2

a) 7x11x23 is even number .

Answer :-

→ 7 * 11 * 23

checking last digit we get,

→ 7 * 1 * 3

→ 21

→ 1 in last .

so, it will be an odd number .

Hence, 7x11x23 is not an even number.

• False .

(b) 7x1x23 is. prime number.

Answer :-

→ 7 * 1 * 23 .

→ 7 = 1 * 7 = Prime number

→ 23 = 1 * 23 = Prime number .

but

→ 7 * 1 * 23 = 161 .

since 161 has factors 7 and 23 other than 1 and itself . it is not a prime number .

Hence, Statement is False .

(c) HCF of 4,20 and 130 is 10.

Answer :-

Prime factors of 4 , 20 and 130 is ,

→ 4 = 2 * 2

→ 20 = 2 * 2 * 5

→ 130 = 2 * 5 * 13

then,

→ HCF = 2

Hence, given statement is False .

Learn more :-

57.63 : 3 is the. Place

https://brainly.in/question/23514539

Product of digit in the tenths place and thousandths place of 15.246

https://brainly.in/question/23804815