Mixed Aptitude Quiz for RBI Grade B Exam

Ques 1.

A man has some oranges , out of which 2% are rotten.He sells 95%of the remaining oranges. Now he is left with 49 oranges .How many oranges had he in all ?

(a) 800
(b) 1000
(c) 600
(d) 9000

Ans 1. Let the number  of oranges the man had be x.

Ques 2.

What percentage error will be made in the calculated volume of a sphere, if the measured value of the radius is 1 1/2% too large ?
(a) 4.6
(b) 5.2
(c) 1.1
(d) 3.6

Ans 2. 

Ques 3.

How many numbers between 100 and 600 are divisible by 5 and 6 both ?
(a) 60
(b) 17
(c) 22
(d) 38

Ans 3. Numbers that are divisible by 5 and 6 both  must be divisible by 30.( 5 and 6 are coprime) .
.  . The desired numbers are : 120, 150, 180 ......600 which are 17 in number .

Ques 4.

If a man walks at the rate of 5km/hr, he misses a train by only 7 minutes . However, if he walks at the rate of 6/km/hr, he reaches the station 5 minutes before arrival of the train. The distance covered by him to reach the station is
(a) 5
(b) 6
(c) 7
(d) 8

Ans 4. Let the distance covered by  the man be x km.

Ques 5.

A merchant in Bombay buys some radio sets from Calcutta , the catalogue Price of which is Rs 600 per set. The trade discount allowed to him by the Calcutta company is 15% on catalogue price. The freight and other charges amount 10 2 1/2% of the catalogue Price/ The Bombay merchant sells each set at 10% discounts on his list price of Rs. 750 thus making a not profit of Rs 1350 . The number of ratio sets bought is
(a) 7
(b) 8
(c) 9
(d) 11

Ans 5.

Ques 6.

The cost of gravelling at the rate of 10 p per m2 the area of a parallelogram whose adjacent sides are 13 m and 140 m and one of the diagonals is 150 m is
(a) Rs 1880
(b) Rs 1680
(c) Rs 1061
(d) Rs 1860

Ans 6.

Ques 7.

The successive discounts of 20% and 15% are equal to a single discount of
(a) 35%
(b) 32 %
(c) 22%
(d) 5%

Ans 7. 

Ques 8.

In the product 459 x 46 x 28* x 484, the digit in the unit's place is 2. The digit to come in place of * is
(a) 3
(b) 5
(c) 7
(d) 1

Ans 8.  9 x 6 x * x 4 must give 2 in the unit's place.
or  6 x * must give 2 in the unit's place .
=>  * = 2, 7

Ques 9.

In an examination 35% candidates failed in one subject and 42% failed in another subject while 15% failed in both the subjects .If 2500 candidates appeared at the examination how many passed in both the subjects ?
(a) 950
(b) 1175
(c) 2125
(d) None of these

Ans 9. Percentage of candidates who that failed in at least one of the subjects
= ( 35- 15) + 15 ( 42 - 15)  = 62%
. . Percentage of candidates  who passed  in both the subjects =100 - 62 = 38%
Hence, number of candidates who passed
in both  the subjects = 38/100 x 2500 = 950.

Ques 10.

If x * y * z = /(x + 2) ( y + 3) / z + 1 , the value of 6 * 15 * 3 is
(a) 2
(b) 3
(c) 4
(d) None of these

Ans 10.