M4maths Previous Puzzles

09 Jun 2020 Percentage

Pappu got following marks in 5 subjects:
English 79 out of 100
Hindi 29 out of 100
Maths 18 out of 100
Science 34 out of 100
Moral Science 17 out of 50

What is his overall percentage across all 5 subjects

OPtion

1) 35%
2) 35.20%
3) 35.40%
4) 39.33%
5) 33%
6) 33.33%
7) 33.39%%
8) 34.33%
9) 35.33%
10) None of these

Solution

Total marks received by Pappu =
79+29+18+34+17 = 177

Maximum total marks = 100+100+10+100+50 =450

Percentage = 177*100/450 = 39.33

Correct Option: 4 Best Solution (3)

08 Jun 2020 Rebate

Due to pandemic, eleectricity board gives a rebate of 30% on the Bill. If Pappu's actual electricity bill for the month of May is Rs. 8712. How much would be the final rebated payment which he has to make?

OPtion

1) 6018.4
2) 6028.4
3) 6038.4
4) 6898.4
5) 6058.4
6) 6068.4
7) 6089.4
8) 6008.4
9) 6098.4
10) None of these

Solution

Due to 30% of rebate, the payment needs to be made is 100-30 = 70% of bill

8712*0.7 = 6098.4

Correct Option: 9 Best Solution (0)

05 Jun 2020 Perfect Square

The least perfect square, which is divisible by each of 15, 20 and 36 is:

OPtion

1) 2500
2) 3600
3) 4900
4) 900
5) 1600
6) 8100
7) 6400
8) 400
9) 1250
10) None of these

Solution

LCM of 15, 20 and 36 is 180

180 could be represented as => 3 x 3 x 2 x 2 x 5

For a perfect square, LCM must
be multiplied with 5.

So required no. = 3^2 x 2*2 x 5^2 = 900

Correct Option: 4 Best Solution (0)

04 Jun 2020 Series

Given the series:
3, 4, 7, 8, 11, 12, ...
What is the tenth term?

OPtion

1) 14
2) 13
3) 15
4) 16
5) 17
6) 18
7) 19
8) 20
9) 21
10) None of these

Solution

Series is
Odd position number is addition of 4 in previous odd positioned number
Even placed number is addition of 1 in previous number
3, 4, 7, 8, 11, 12, 15, 16, 19, 20

Correct Option: 8 Best Solution (1)

03 Jun 2020 CODE DECODE

The four colors of LUDO are RED, BLUE, GREEN and YELLOW.
IF
RED = 27
BLUE= 40
GREEN= 49
then
YELLOW = ?

OPtion

1) 94
2) 96
3) 91
4) 84
5) 82
6) 72
7) 92
8) 60
9) 52
10) None of these

Solution

A=1, B=2, C=3,..Z=26
Sum of position value of all alphabets.

YELLOW = 25+5+12+12-15+23 = 92

Correct Option: 7 Best Solution (5)

02 Jun 2020 Series

0, 0, 1, 1, 4, 8, 9, 27, 16,..

Tenth term of this series would be:

OPtion

1) 33
2) 27
3) 25
4) 36
5) 64
6) 42
7) 45
8) 49
9) 56
10) None of these

Solution

This is the series of squares and cubes of non-negative integers. 0 squared, 0 cubed, 1 squared, 1 cubed, 2 squared, 2 cubed, etc. So the next number in the series is 4 cubed, or 64.

Correct Option: 5 Best Solution (5)

01 Jun 2020 Probability

If you toss a coin ten times and it lands heads up every time, what is the probability that it will land heads up if you toss it again?

OPtion

1) 1/11
2) 1/12
3) 1 - 1/11
4) 1 - 1/10
5) 3/10
6) 1 - 10/11
7) 1/2
8) 1 - 9/10
9) 11/10 - 1
10) None of these

Solution

There's a 50 percent chance it will land heads up. The final coin toss is independent of the first ten tosses.

Correct Option: 7 Best Solution (0)

29 May 2020 Series

Given the series:
0, 1, 1, 2, 3, 5, 8, 13, ...
What is the fifteenh term?

OPtion

1) 24
2) 25
3) 18
4) 144
5) 89
6) 377
7) 23
8) 233
9) 431
10) None of these

Solution

Its a Fibonacci series:
0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377

Correct Option: 6 Best Solution (3)

28 May 2020 Sequence

What is the next number in the sequence? 1 11 21 1211 111221 312211

OPtion

1) 13122111
2) 13112121
3) 13112222
4) 13111221
5) 13112221
6) 13212221
7) 13222221
8) 13113221
9) 13132221
10) None of these

Solution

13112221. Each number describes the previous number. Starting with 1, the second line describes it 11 (one 1). Then the third line describes 11 as 21 (two 1's). Then the fourth line describes 21 as 1211 (one 2, one 1). This is the pattern.

Correct Option: 5 Best Solution (2)

27 May 2020 Order

"Samosa King" food delivery sells samsoas in orders of six, nine, and twenty.
What is the largest number of samosa's you cannot order from "Samosa King"?

OPtion

1) 3
2) 5
3) 7
4) 11
5) 31
6) 89
7) 43
8) 91
9) 113
10) None of these

Solution

Since you can buy 6 and 9, you can buy any number divisible by 3 except for 3 itself.

Let's look at numbers over 40. If a number is over 40 is not divisible by 3, you can get a number divisible by 3 by subtracting either 20 or 40.

For 43, you may subtract 40 to get the number 3. But you cannot buy packs if 3, you can only get greater multiples of 3.

For all numbers greater than 43, the number will be divisible by 3 and greater than three, or you can subtract 20 or 40 and get a number that is divisible by 3 and greater than 3.

So you can create any number greater than 43 with 0, 1 or 2 packs of 20, 0 or 1 packs of 9, and n number of packs of 6, where n can be any integer.

Correct Option: 7 Best Solution (0)