• Placement Questions
• /
• General

general Math Questions and Answer Page 37

(#M40000182) GENERAL QUESTION Keep an EYE

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.
What is the sum of the three digits?

Asked In general Naveen (14 years ago)

Solved Vadivelan M Read Solution (9)

Is this Puzzle helpful?   (22)   (0) Submit Your Solution

(#M40000181) GENERAL QUESTION Keep an EYE

There are 3 persons X, Y and Z. On some day, X lent tractors to Y and Z as many as they had. After a month Y gave as many tractors to X and Z as many as they have. After a month Z did the same thing. At the end of this transaction each one of them had 24.

Find the tractors each originally had?

Asked In general Naveen (14 years ago)

Solved lilly Read Solution (5)

Is this Puzzle helpful?   (19)   (4) Submit Your Solution

(#M40000179) GENERAL QUESTION Keep an EYE

There are 20 people in your applicant pool, including 5 pairs of identical twins.
If you hire 5 people randomly, what are the chances you will hire at least 1 pair of identical twins? (Needless to say, this could cause trouble

Asked In general Naveen (14 years ago)

Unsolved Read Solution (2)

Is this Puzzle helpful?   (12)   (0) Submit Your Solution

(#M40000178) GENERAL QUESTION Keep an EYE

How many possible combinations are there in a 3x3x3 rubics cube?
In other words, if you wanted to solve the rubics cube by trying different combinations, how many might it take you (worst case senerio)?
How many for a 4x4x4 cube?

Asked In general Naveen (14 years ago)

Unsolved

Is this Puzzle helpful?   (8)   (1) Submit Your Solution

(#M40000176) GENERAL QUESTION Keep an EYE

There are 3 ants at 3 corners of a triangle, they randomly start moving towards another corner.
What is the probability that they don't collide?

Asked In general Naveen (14 years ago)

Solved Shivani Agrawal Read Solution (4)

Is this Puzzle helpful?   (36)   (1) Submit Your Solution

(#M40000175) GENERAL QUESTION Keep an EYE

Two identical pack of cards A and B are shuffled throughly. One card is picked from A and shuffled with B. The top card from pack A is turned up. If this is the Queen of Hearts, what are the chances that the top card in B will be the King of Hearts?

Asked In general Naveen (14 years ago)

Unsolved Read Solution (1)

Is this Puzzle helpful?   (6)   (1) Submit Your Solution

(#M40000174) GENERAL QUESTION Keep an EYE

Find the smallest number such that if its rightmost digit is placed at its left end, the new number so formed is precisely 50% larger than the original number.

Asked In general Naveen (14 years ago)

Solved rajeev Read Solution (4)

Is this Puzzle helpful?   (11)   (2) Submit Your Solution

(#M40000173) GENERAL QUESTION Keep an EYE

Consider a number 235, where last digit is the sum of first two digits i.e. 2 + 3 = 5.
How many such 3-digit numbers are there?

Asked In general Naveen (14 years ago)

Solved Karthik Pandiyan Read Solution (5)

Is this Puzzle helpful?   (19)   (1) Submit Your Solution

(#M40000172) GENERAL QUESTION Keep an EYE

There is a safe with a 5 digit number as the key. The 4th digit is 4 greater than the second digit, while the 3rd digit is 3 less than the 2nd digit. The 1st digit is thrice the last digit. There are 3 pairs whose sum is 11.

Find the number.

Asked In general Naveen (14 years ago)

Solved madhuri Read Solution (5)

Is this Puzzle helpful?   (34)   (8) Submit Your Solution

(#M40000171) GENERAL QUESTION Keep an EYE

Grass in lawn grows equally thick and in a uniform rate. It takes 24 days for 70 cows and 60 days for 30 cows to eat the whole of the grass. How many cows are needed to eat the grass in 96 days?

Solution

I think this approach is very long to solve this problem i try to reduce some step
g= grass initially, r= rate at which grass grow/day, c= cow eat grass/day
g+24r=70*24c=1680c-----------1
g+60r=60*30c=1800c--------->g=1800c-60r----------------2
by solving this 2 equation we have relation c=(3/10)r-------------3
g+96r=96nc
=>96nc=1800c-60r+96r=1800c+36r=1800c+120c=1920c
=>n=20
This answer is given by ANKIT and is correct answer

Like manish sir answer on facebook.

Asked In general Naveen (14 years ago)

Solved Read Solution (4)

Is this Puzzle helpful?   (21)   (16) Submit Your Solution undefined