31 .

Find out the wrong number in the given sequence of numbers.

1, 2, 6, 15, 31, 56, 91

Find out the wrong number in the given sequence of numbers.

1, 2, 6, 15, 31, 56, 91

A.31

B. 91

C. 56

D.15

View AnswerAns: 91
32 .

Insert the missing number.

7, 26, 63, 124, 215, 342, (....)

Insert the missing number.

7, 26, 63, 124, 215, 342, (....)

A.481

B. 511

C. 391

D.421

View AnswerAns: 511
33 .

The price of commodity X increases by 40 paise every year, while the price of commodity Y increases by 15 paise every year. If in 2001, the price of commodity X was Rs. 4.20 and that of Y was Rs. 6.30, in which year commodity X will cost 40 paise more than the commodity Y ?

The price of commodity X increases by 40 paise every year, while the price of commodity Y increases by 15 paise every year. If in 2001, the price of commodity X was Rs. 4.20 and that of Y was Rs. 6.30, in which year commodity X will cost 40 paise more than the commodity Y ?

A.2010

B. 2011

C. 2012

D.2013

View AnswerAns: 2011
34 .

There are two examinations rooms A and B. If 10 students are sent from A to B, then the number of students in each room is the same. If 20 candidates are sent from B to A, then the number of students in A is double the number of students in B. The number of students in room A is:

There are two examinations rooms A and B. If 10 students are sent from A to B, then the number of students in each room is the same. If 20 candidates are sent from B to A, then the number of students in A is double the number of students in B. The number of students in room A is:

A.20

B. 80

C. 100

D.200

View AnswerAns: 100
35 .

If a - b = 3 and a2 + b2 = 29, find the value of ab.

If a - b = 3 and a2 + b2 = 29, find the value of ab.

A.10

B. 12

C. 15

D.18

View AnswerAns: 10