Mathematical Operations Test

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Mathematical Operations Test - 1

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Weekly Quiz Competition

Question 1
3 / -1

If × stands for 'addition', ÷ stands for 'subtraction', + stands for 'multiplication' and-stands for 'division', then 20 × 8 ÷ 8 - 4 + 2 = ?

A
80

B
25

C
24

D
5

Solution

By the Given data , We have the expression:
20 + 8 - 8 ÷ 4 × 2 = 20 + 8 - 2 × 2 = 20 + 8 - 4 = 24.
Question 2
3 / -1

The following equation is incorrect. Which two signs should be interchanged to correct the equation?
1 ÷ 14 x 30 + 20 - 10 = 12

A
- and +

B
÷ and x

C
x and -

D
+ and ÷
Question 3
3 / -1

In a cricket match, five batsmen P, Q, R, S and T scored an average of 36 runs. S Scored 5 more than T; T scored 8 fewer than P; Q scored as many as S and T combined; and Q and R scored 107 between them. How many runs did T score ?

A
20

B
29

C
28

D
24

Solution

Let the runs scored by P, Q, R, S and T be a, b, c, d and e
From given data,
a + b + c + d + e = 36 x 5 = 180
b + c = 107
Let a = x
e = x - 8
d = x - 3
now 3x - 11 + 107 = 180
3x = 84
x = 28
e's score = 28 - 8 = 20
Question 4
3 / -1

5x - 6 = 3x - 8
Solve the above equation.

A
2

B
-1

C
-2

D
1

Solution

Given 5x - 6 = 3x - 8
5x - 3x = -8 + 6
2x = -2
=> x = -1.
Question 5
3 / -1

If Q means 'add to', J means 'multiply by', T means 'substract from' and K means 'divide by' then 30 K 2 Q 3 J 6 T 5 = ?

A
18

B
28

C
31

D
103

Solution

Using Correct Symbols , We have :
Given expression = 30 / 2 + 3 x 6 - 5 = 15 + 18 - 5 = 28
Question 6
3 / -1

A sum of Rs.1890 has to be used to give 9 prizes to the customers of a super market for their overall academic purchases. If each prize is Rs.30 less than its preceding price, what is the least value of the price?

A
90

B
95

C
85

D
80

Solution

Let the least value of the prize = Rs. x
Then the next value of the prize is x + 30 , x + 60, x + 90, ....x + 240.
Given total amount of cash prizes = Rs.1890
--> x + (x + 30) + (x + 60) + (x + 90) + ....+ (x + 240) = 1890
--> 9x + (30 + 60 + 90 + 120 + 150 + 180 + 210 + 240) = 1890
--> 9x + 30(1 + 2 + 3 + 4....+ 8) = 1890
--> 9x + 30(36) = 1890
--> 9x = 810 --> x=90
Hence the least value of the prize x = 90
Question 7
3 / -1

The last two digits of 2151⁴¹⁵?

A
81

B
61

C
91

D
51

Solution

Unit digit of this expression is always 1 as the base ends with 1.
For the tenth place digit we need to multiply the digit in the tenth place of the base and unit digit of the power and take its unit digit.
i.e, tenth place digit in 2151 is 5 and
tenth place digit in power 415 is 1
And the units digit in the product of 5 x 1 = 5
Therefore, last two digits of 2151⁴¹⁵ is 51.
Question 8
3 / -1

If × means ÷, - means ×, ÷ means + and + means- than (3 - 15 ÷ 19) × 8 + 6 = ?

A
8

B
4

C
2

D
-1

Solution

By the given data, we have the expression :
(3 × 15 + 19) ÷ 8 - 6 = (45 + 19) ÷ 8 - 6 = 64 ÷ 8 - 6 = 8 - 6 = 2
Question 9
3 / -1

If "+" means "minus", "x" means "divided by", "÷" means "plus" and "-" means "multiplied by", then 81 x 9 + 10 – 6 ÷ 5 = ?

A
46

B
-46

C
47

D
-45
Question 10
3 / -1

The value of -4-(-10) is how much greater then the value of -10-(-4) ?

A
10

B
6

C
12

D
0

Solution

-4-(-10) = -4 + 10 = 6
-10-(-4) = -10 + 4 = -6
Therefore, 6-(-6) = 6 + 6 = 12

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Re-Attempt Weekly Quiz Competition

Mathematical Operations Test - 1

Result

Mathematical Operations Test - 1

Score

-

Rank

-

SHARING IS CARING

Question 1

80

25

24

5

Solution

Question 2

- and +

÷ and x

x and -

+ and ÷

Question 3

20

29

28

24

Solution

Question 4

2

-1

-2

1

Solution

Question 5

18

28

31

103

Solution

Question 6

90

95

85

80

Solution

Question 7

81

61

91

51

Solution

Question 8

8

4

2

-1

Solution

Question 9

46

-46

47

-45

Question 10

10

6

12

0

Solution

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My Perfomance

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