Find two composite numbers between 50 & 90 such that one of the number

1.	Find two composite numbers between 50 & 90 such that one of the number is a square number and the difference between the numbers is which multiple of 9?
Answer» Answer: Answer i) NUMBER of two-digit number =90−9=81, Total number =90 Probability of being a two-digit number = 90 81 ii) Since there are 9 perfect square NUMBERS such that 1,4,9,16,25,36,49,64,81 Probability of being a perfect square = 90 9 = 10 1 iii) Since there are 12 numbers divisible of 7 such that 7,14,21,28,35,42,49,56,63,70,77,84 Probability of being a perfect square = 90 12 = 15 2 .

Find two composite numbers between 50 & 90 such that one of the number is a square number and the difference between the numbers is which multiple of 9?

Answer»

Answer:

Answer

i) NUMBER of two-digit number =90−9=81, Total number =90

Probability of being a two-digit number =

ii) Since there are 9 perfect square NUMBERS such that 1,4,9,16,25,36,49,64,81

Probability of being a perfect square =

iii) Since there are 12 numbers divisible of 7 such that 7,14,21,28,35,42,49,56,63,70,77,84

Probability of being a perfect square =