ap state maths class 9 chapter 15 exercise 2 problem 3.please don't spam .l will report if you spam
Answers
Answer:
Q) What is the number?
A) The number is 35.
Q) Can you spot the four clues that help and the four clues that do not not help in finding it?
A) Clues that help-- c, d, g and h
Clues that don't help-- a, b, e and f
Explanation:
All the multiples of 7 from the grid are 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91 and 98. (According to clue c)
The odd numbers from the multiples of 7 are 7, 21, 35, 49, 63, 77 and 91. (According to clue d)
35 and 49 are the numbers whose one's digit is larger than its ten's digit. (According to clue g)
After sorting out these numbers, 35 was the only number which satisfied all the conditions including clue h.
So, 35 is the required answer.
Clearly, without taking the help of the left four clues, the question is solved, i.e., these four clues are self sufficient to satisfy all the eight conditions. Hence, clues a, b, e and f proved useless in solving this question.