Challenger App

No.1 PSC Learning App

★
★
★
★
★
1M+ Downloads
Some bacteria are photosynthetic. Where are the photosynthetic pigments located in these cells?
Six girls named P, Q, R, S, T and U are sitting in a straight line. All are facing the north direction. U sits third to the left of R. S sits third to the right of Q. U sits second to the left of Q. T is not the immediate neighbour of U. What is P's position in the line?

Refer to the following letter, number and symbol series and answer the question.

(Left) 4 T 6 S 2 A D & C E 2 4 + & 7 6 U 5 H U K 8 E W @ E A & P (Right)

How many such vowels are there in the series which are immediately preceded by a number and also immediately followed by a consonant?

image.png
8118 is divisible by:
What is the measure of each exterior angle of a regular hexagon?

In this question, a group of numbers/symbols is coded using letters as per the table given below and the conditions which follow. The correct combination of codes following the condition is your answer.

Number/Symbol

^

#

5

7

@

%

>

2

!

?

4

8

$

3

Letter Code

L

F

B

J

D

H

E

X

V

Z

K

U

R

P


Conditions:

(i) If the first element is a symbol and the last, a number, the codes for these two are to be interchanged.

(ii) If the first element is an odd number, then the first and last elements are to be coded as Ø and ¥, respectively.

(iii) If both second and third elements are perfect squares, the third element is to be coded as the code for the second element.

How will ‘7 # ^ 2 !’ be coded?

Find the least six-digit number that is exactly divisible by 8, 10, 12 and 16.
Find the total surface area of a cylinder whose radius of base is 7 cm and height is 15 cm.

A statement is given followed by two assumptions numbered I and II. You have to assume everything in the statement to be true and decide which of the given assumptions is/are implicit in the statement.

Statement:

Many people could not reach their work places due to the strike by transport workers, which has brought bus services to a complete halt..

Assumptions:

I Citizens should be using the metro rail services more.

II. Many people are dependent on bus services to travel to their work place.

Which of the following is NOT a quadrilateral?

In this question, a group of numbers/symbols is coded using letters as per the table given below and the conditions which follow. The correct combination of codes following the condition is your answer.

Number/Symbol

8

=

4

7

@

%

>

2

!

?

5

3

<

9

Code

Z

F

T

J

D

H

E

X

V

W

K

U

P

A

Conditions:

(i) If the first element is a symbol and the last, a number, the codes for these two are to be interchanged.

(ii) If the first element is an odd number and the last, an even number, the first and last elements are to be coded as Ø.

(iii) If both second and third elements are perfect squares, the third element is to be coded as the code for the second element.

How will '3 = < 2 @ 8' be coded?

image.png
image.png

In this question, a statement is followed by two conclusions. Which of the two conclusions is/are true with respect to the statement?

Statement:
F = E \geq D = A > Z < S = O

Conclusions:
I. F≥DF \geq D
II. D < O

Study the given diagram carefully and answer the following question. The numbers in different sections indicate the number of persons with different professions.

image.png

How many people are Gardeners but NOT Engineers?

This question is based on the five, three-digit numbers given below:

(Left) 448 455 275 563 215 (Right)

What will be the resultant if the third digit of the largest number is added to the second digit of the smallest number?

The number of solutions to the pair of linear equations 5x-3y = 7 and 7x + 4y = 18 is:

Three statements are followed by three conclusions numbered I, II and III. You have to consider these statements to be true, even if they seem to be at variance with commonly known facts, and decide which of the given conclusions logically follow/s from the given statements.

Statements:

Some hotels are dormitories.

Some gates are shelters.

All shelters are fences.

Conclusions:

(I) Some gates are dormitories.

(II) Some fences are gates.

(III) Some hotels are shelters.

Janhvi and Pranitha are standing at the extreme ends of a row in which all the students are facing the north. Only 26 students are standing between Janhvi and Ravi. Only 14 students are standing between Ravi and Pranitha. Total how many students are standing in the line?
Select the option that is related to the fifth number in the same way as the second number is related to the first number and the fourth number is related to the third number. 27: 140:: 22: 115 :: 32:?

If '+' means '÷', '−' means '+', '×' means '−' and '÷' means '×', then, what will be the value of the following expression?

[{(12×3)−(2÷3)}+(1−4)]÷4[\{(12 \times 3) - (2 \div 3)\} + (1 - 4)] \div 4


Select the set in which the numbers are related in the same way as are the numbers of the following sets. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13-Operations on 13 such as adding /deleting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed) (2, 4, 18) (4, 6, 50)
All 65 students of a class are standing in a row facing the north. Amrit is 46th from the extreme left end of the row, whereas Kashvi is 14th from the extreme right end. How many students are standing between Amrit and Kashvi?
A fruit vendor bought 800 apples for ₹4,800. He spent ₹800 on transportation. How much should he sell each to get a profit of 10 on each apple?
If x : 6 : : 6 : y, and x : y : : y : 6, then which of the options below gives the correct values of x and y, in that order?
The floor of an office has dimensions 5 mx 3 m. The cost of painting the walls and ceiling is 7,440 at the rate of 60/m². Find the height of the room (in m). (rounded off to one decimal place)
If each of the digits in the number given below is arranged in the descending order from left to right, what will be the sum of the digits that are second from the left and third from the right in the new number thus formed? (Left) 259812357 (Right)
Six doctors, K, L, M, N, O and P, are sitting in a straight line. All are facing the north direction. Only O is sitting between N and L. Only P is sitting between L and K. K sits fifth to the right of M. Who is sitting to the immediate right of M?
image.png
If the average of two numbers is 26 and one of them is 12, then find the other number.
image.png
Which of the following numbers will replace the question mark (?) in the given series? 5, 6, 10, 12, 15, ?, 20, 24
image.png
A dealer sold three-fifth of his goods at a gain of 25% and the remaining at cost price. What is his loss or gain percent in the whole transaction?
Vishal is standing in a park facing the south direction. He then turns 90° clockwise on the same point. After that, he turns 45° clockwise. In which direction is he facing now?
image.png
In the given letter-cluster pairs, the first letter-cluster is related to the second letter-cluster following a certain logic. Study the given pairs carefully, and from the given options, select the pair that follows the same logic. STM: RUL PJR: OKQ
image.png
Six friends, Arun, Suresh, Rahul, Priyanka, Dilan and Hiba, took a test online. All of them scored different marks in the test. Suresh scored more than Priyanka but less than Arun. Hiba scored the least. Dilan scored less than Rahul. Arun scored more than Priyanka and Rahul. Who among the six scored the most?
Rachna can eat 21 oranges in 60 minutes. She wants to know how many minutes it would take her to eat 35 oranges at the same pace?
Two pipes A and B can fill a tank in 15 hours and 20 hours, respectively, while a third pipe C can empty the full tank in 30 hours. If all the three pipes operate simultaneously, in how much time will the tank, initially empty, be filled?
image.png
image.png
A father's age is seven times that of his son's age. Three years from now, the age of the father will be five times that of his son's age. What is the present age of the father?

The value of 1234321=\sqrt{1234321} =

The value of 156.025 + 251.216 - 52.156 is:

image.png
Six boxes A, B, C, D, E and F are arranged in a vertical column but not necessarily in the same order. B is placed at second position from the top. Only D is placed between A and B. E is at one of the positions below D and there is only one box between E and D. F is not at the bottom most position. Which box is placed at second position from the bottom?
Which of the following numbers will replace the question mark (?) in the given series? 9, 10, 22, 69, 280,?