Question

The length of a red ribbon is 30 cm and that of white ribbon
is 42 cm. Find the length of the longest piece that can be
from both the ribbons.
Find the greatest number that can divide 80 and 90 exactly
Some books are kent in the cupboard If these book​

Answer 1

Step-by-step explanation:

HCF of 30 and 42

42 = 30 × 1 + 12

30 = 12 × 2 + 6

12 = 6 × 2 + 0

so the longest ribbon that can be cut from both red and white ribbon is 6 cm

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2) HCF OF 80 AND 90

80= 5×2×2×2×2

90=3×3×5×2

COMMON FACTOR IS 5×2=10

10 IS THE RIGHT ANSWER.

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