Basic Numeracy - Online Test

Q1. Which one of the following is not a prime number?
Answer : Option D
Explaination / Solution:

91 is divisible by 7. So, it is not a prime number.

Q2. A man has Rs. 480 in the denominations of one-rupee notes, five-rupee notes and ten-rupee notes. The number of notes of each denomination is equal. What is the total number of notes that he has ?
Answer : Option D
Explaination / Solution:

Let number of notes of each denomination be x.

Then x + 5x + 10x = 480

 16x = 480

 x = 30.

Hence, total number of notes = 3x = 90.


Q3. 3, 5, 11, 14, 17, 21
Answer : Option C
Explaination / Solution:

Each of the numbers except 14 is an odd number. The number '14' is the only EVEN number.

Q4. A person crosses a 600 m long street in 5 minutes. What is his speed in km per hour?
Answer : Option B
Explaination / Solution:

Speed =600m/sec.
5 x 60

   = 2 m/sec.

Converting m/sec to km/hr 

   =2 x18km/hr
5

   = 7.2 km/hr.


Q5. A can do a work in 15 days and B in 20 days. If they work on it together for 4 days, then the fraction of the work that is left is :
Answer : Option D
Explaination / Solution:

A's 1 day's work =1;
15

B's 1 day's work =1;
20

(A + B)'s 1 day's work =(1+1)=7.
152060

(A + B)'s 4 day's work =(7x 4)=7.
6015

Therefore, Remaining work =(1 -7)=8.
1515


Q6. The difference between simple and compound interests compounded annually on a certain sum of money for 2 years at 4% per annum is Re. 1. The sum (in Rs.) is:
Answer : Option A
Explaination / Solution:

Let the sum be Rs. x. Then,

C.I. =x1 +42x=676xx=51x.
100625625

S.I. =x x 4 x 2=2x.
10025

51x-2x= 1
62525

 x = 625.


Q7. A and B invest in a business in the ratio 3 : 2. If 5% of the total profit goes to charity and A's share is Rs. 855, the total profit is:
Answer : Option B
Explaination / Solution:

Let the total profit be Rs. 100.

After paying to charity, A's share = Rs.95 x3= Rs. 57.
5

If A's share is Rs. 57, total profit = Rs. 100.

If A's share Rs. 855, total profit =100x 855= 1500.
57


Q8. The sum of ages of 5 children born at the intervals of 3 years each is 50 years. What is the age of the youngest child?
Answer : Option A
Explaination / Solution:

Let the ages of children be x, (x + 3), (x + 6), (x + 9) and (x + 12) years.

Then, x + (x + 3) + (x + 6) + (x + 9) + (x + 12) = 50

 5x = 20

 x = 4.

 Age of the youngest child = x = 4 years.


Q9. An accurate clock shows 8 o'clock in the morning. Through how may degrees will the hour hand rotate when the clock shows 2 o'clock in the afternoon?
Answer : Option D
Explaination / Solution:

Angle traced by the hour hand in 6 hours =360x 6º= 180º.
12

Q10. he ratio between the length and the breadth of a rectangular park is 3 : 2. If a man cycling along the boundary of the park at the speed of 12 km/hr completes one round in 8 minutes, then the area of the park (in sq. m) is:
Answer : Option B
Explaination / Solution:

Perimeter = Distance covered in 8 min. =12000x 8m = 1600 m.
60

Let length = 3x metres and breadth = 2x metres.

Then, 2(3x + 2x) = 1600 or x = 160.

 Length = 480 m and Breadth = 320 m.

 Area = (480 x 320) m2 = 153600 m2.