Question

1. Fill in the blanks.
(a) Prime factorisation of 15 :
Prime factorisation of 90:
LCM of 15 and 90 =
(b) Prime factorisation of 18 :
Prime factorisation of 24 :
LCM of 18 and 24 =
(c) Prime factorisation of 25 :
Prime factorisation of 15 :
LCM of 25 and 15 =
(d) Prime factorisation of 27 :
Prime factorisation of 42 :
LCM of 27 and 42 =​

Answer 1

Step-by-step explanation:

(a)15=3×5

2×3×3×5

LCM OF 15 AND 90=90

(b)18=1×18,9×2,3×6

24=2×2×2×3=2³×3

LCM OF 18 AND 24=72

(C)25=5×5

15=3×5

LCM OF 25 AND 15=75

(d)27=3×9,27×1

42=2×3×7

LCM OF 27 AND 42=378