Question

Section A
1. The LCM of two co-prime numbers is
a) 0
b) Their product
c) their sum
d) their difference
2. Sound of crackers is heard during festival days, but
uval days, but the sound of supernova
explosion in space is not heard on the surface of ear
the surface of earth because of
a) lesser gravity
b) the influence of the other
planets
c) large distance
d) absence of medium
3.1.2348 is
a) a rational number
b) terminating decimal
c) an irrational number
d) an integer
4. The HCF of two consecutive even numbers is
a) 2
b) 1
c) 0
d) 3
5. For every positive integer 'n', na-n is divisible by
a) 6
b) 4
d) 8
c) 2
a) 51
c) 25
6. The HCF of 867 and 255 is
b) 35
d) 55
7. If two positive integers 'm' and 'n' can be expressed as m=x2,5 and
v2 where 'x' and 'y' are prime numbers, then HCF(m ni
b)ay
d) x*y
a) x²y?
c) mºy2​

Answer 1

1-ans b. their product
2-ans d. absence of medium
3-ans a. rational no.
4-ans a. 2
5-ans c. 2
6-ans a.51
7-ans a.
$x ^{2}y ^{2}$