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Book Math Questions and Answer Page 2380

(#M40000153) BOOK QUESTION who is the Doctor and the Engineer? Keep an EYE

One of Mr. Bajaj, his wife, their son and Mr. Bajaj's mother is an Engineer and another is a Doctor.

If the Doctor is a male, then the Engineer is a male.
If the Engineer is younger than the Doctor, then the Engineer and the Doctor are not blood relatives.
If the Engineer is a female, then she and the Doctor are blood relatives.
Can you tell who is the Doctor and the Engineer?

Asked In Book Naveen (15 years ago)

Solved Vadivelan M Read Solution (5)

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(#M40000152) BOOK QUESTION Keep an EYE

If you take a marker & start from a corner on a cube, what is the maximum number of edges you can trace across if you never trace across the same edge twice, never remove the marker from the cube, & never trace anywhere on the cube, except for the corners & edges?

Solution

Maximum number of edges = 9. Start from one corner. Select any face including that corner. Complete a square (4 edges) around the face to reach at the starting corner point . Now, move to the opposite face through the edge joining them and passing through the starting point(1 edge). Now, complete the square of edges around this face(4 edges). Total = 4+1+4 = 9 edges
This answer is given by TIJO JOSE and is correct


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Asked In Book Naveen (15 years ago)

Solved Read Solution (5)

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(#M40000151) BOOK QUESTION Keep an EYE

There are 9 coins. Out of which one is odd one i.e weight is less or more. How many iterations of weighing are required to find odd coin?

Solution

It requires a maximum of 4 weighings. Divide the 9 balls into sets of 3 each. Let them be set1, set2 and set3. Weigh set1 and set2 against each other. If they weigh equal, then set3 contains odd coin. Otherwise, weigh set1 against set3. If they weigh equal, set2 contains odd coin. If in both cases, they do not weigh equal, then set1 contains odd coin. Now, we have identified set with defective coin in maximum 2 weighings. Repeat this process on individual coins of the found set. This requires a max of 2 more weighings. Hence, the odd coin can be found in a maximum of 4 weighings at all times.
This answer is given by TIJO JOSE and is right

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Asked In Book Naveen (15 years ago)

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(#M40000150) BOOK QUESTION how many zeros. Keep an EYE

A certain street has 1000 buildings. A sign-maker is contracted to number the houses from 1 to 1000. How many zeroes will he need?

Asked In Book Naveen (15 years ago)

Solved Wafa Read Solution (3)

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