24
Q:

# What 5 - digit number has the following features :

If we put the numeral 1 at the beginning, we get a number three times smaller than if we put the numeral 1 at the end of the number?

Q:

Solve the following equations and find the value of abc? A) 3 B) 6 C) 9 D) 12

Explanation:

From the given equations,

$(a+b+c)2=a2+b2+c2+2(ab+bc+ca)$

36 - 14 = 2(ab + bc + ca)
22/2 = ab + bc + ca
ab + bc + ca = 11

= (6) (14 - 11)
=(6)(3)
=18

Since,

36 - 3abc = 18

-3abc = 18 - 36

-3abc = -18

abc = 6.

Filed Under: Math Puzzles
Exam Prep: Bank Exams , CAT

29 14118
Q:

Find the missing number in the following puzzle? A) 86 B) 98 C) 104 D) 112

Explanation:

The logic in the given puzzle:

2+3 = 8
3+7 = (7+2)x3 = 27
4+5 = (5+3)x4 = 32
5+8 = (8+4)x5 = 60
6+7 = (7+5)x6 = 72

Similarly,

7+8 = (8+6)x7 = 98.

Filed Under: Math Puzzles
Exam Prep: Bank Exams

103 32590
Q:

Following the same logic, crack this mathematical puzzle ? A) 4 B) 2 C) 1 D) 3

Explanation:

Logic Followed in the given puzzle ::

The logic here is the number of circles in each 4 digit number mentioned.

8801 has 5

5261 has 1

and so on

Filed Under: Math Puzzles
Exam Prep: Bank Exams , CAT , GATE

28 23492
Q:

What value will replace the question mark in the puzzle? A) 64 B) 56 C) 46 D) 36

Explanation:

Logic ::

First number on the right hand side is the second number in the left side of equation ( and ) second number on the right side is the sum of two numbers on the left side of the equation.

Hence, 2 + 4 = 4(2+4) = 46.

Filed Under: Math Puzzles
Exam Prep: AIEEE , Bank Exams , CAT

20 2905
Q:

Solve the value of D? A + B = 15 .... (1)

B x C = 84 .... (2)

C ÷ 4 = 3  .... (3)

B + D = 18 .... (4)

From (3), we get C = 12

From (2), we get B = 84/12 = 7

From (1), we get A = 15 - 7 = 8

From (4), we get D = 18 - 7 = 11

Hence, D = 11.

Subject: Math Puzzles Exam Prep: Bank Exams
Job Role: Bank Clerk , Bank PO

5166
Q:

Can you solve this maths puzzle? A) 10 B) 12 C) 14 D) 18

Explanation:

The logic in this puzzle is summing the result of [subtraction of upper two digits] & [addition of lower two digits]

Hence, the result is

(5 - 3) + (2 + 8) = 2 + 10 = 12.

Filed Under: Math Puzzles
Exam Prep: Bank Exams

24 3048
Q:

90% of people fail to solve this math puzzle? A) 45 B) -20 C) 35 D) -60

Explanation:

A - A - A = 20
B - B - B = 15
C - C - C = 25

A = -20
B = -15
C = -25

=> A + B + C = (-20)+(-15)+(-25) = -20 - 15 - 25 = -60.

Filed Under: Math Puzzles
Exam Prep: CAT , Bank Exams
Job Role: Bank Clerk , Bank PO

25 4428
Q:

Can you solve this riddle? A) 1 B) 3 C) 5 D) 0

Explanation:

5 + 5 = 10

5x 2 + 2 = 12

5 x 2 - 1 x 5 = 5

Hence, $∆$ = 1.