Question

Find the greatest length of a measure of stick which can be used to measure exactly 30 cm, 60 cm or 90 cm.​

Answer 1

Answer:

Therefore, 15 cm is the greatest length of a scale that can measure exactly 30cm, 90cm, 1m 20cm, and 1m 35cm lengths.

Answer 2

15

Step-by-step explanation:

multiples of the number 15 = 15, 30, 45, 60, 75, 90, 105,...

so here only the number is 15 which is divisible by all the 3 given numbers that are 30, 60 or 90.