Answer Posted / somasundarraj

1,2,3,4
2,3,4,5
.....
.....
37,38,39,40
and their reverse as
4,3,2,1
5,4,3,2
.....
....
40,39,38,37

total no. of ways to arrange 4 numbers out of 40 = 40 P 4

probability= 1- 12*37 / 40*39*38*37
= 29639 /29640

be * be = acb a,b,c,e are non zero numbers find b,e.

1276

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A works thrice as much as B. If A takes 60 days less than B to do a work then find the number of days it would take to complete the work if both work together?

1275

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In a class photograph, 5 girls are sitting in the front where as 20 boys are standing behind them. The corner two positions are reserved for the tallest boys of the class. What are the number of ways the students may be arranged?

1136

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1203

---

Average of 5 number is -10 sum of 3 numbers is 16,what is the average of other two numbers?

1077

---

A cubical rectangular bar has the dimensions with the ratio 5 : 4 : 3. Its volume is 7500. What is the surface area of the bar?

1815

---

one answer is 200/3 % it is perfectly correct wecannot recollec the prob. so place it blindly.

1209

---

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1169

---

A team P of 20 engineers can complete a task in 32 days. Another team Q of 16 engineers can complete the same task in 30 days. Then the ratio of working capacity of 1 member of P to that of a member of Q is:

1565

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1227

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1176

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1194

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How many people are there in the queue if I am 7th in the queue from either end?

1167

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Zulus always speak truth and Hutus always speak lies. There are three persons A,B&C. A met B and says " I am a Zulu or I am Hutu". We don't know what exactly he said. then B meets C and says to c that " A is a Zulu ". Then C replied " No, A is a Hutu ". How many Zulus are there ?

1496

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A 4" cube is painted in all its faces and then it is cut down into 1" blocks. How many 1" blocks are there even without a single face being painted?

1342

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