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Worksheets

Human Calculator

Total questions: 15

Worksheet time: 25mins

Name
Class
Date
1.

A train can travel 50% faster than a car. Both start from point A at the

same time and reach point B 75 kms away from A at the same time. On the

way, however, the train lost about 12.5 minutes while stopping at the stations.

The speed of the car is:

a)

100kmph

b)

110kmph

c)

120kmph

d)

130kmph

2.

Given that sin(α) = 1/3 and cos(β) = 3/5, find the value of sin(α + β).

a)

(3 + 8√2)/15

b)

(2 + 4√2)/15

c)

(3 + 8√2)/14

d)

(3 + 8

√2)/12

3.

A cistern of capacity 8000 litres measures externally 3.3 m by 2.6 m by

1.1 m and its walls are 5 cm thick. The thickness of the bottom is:

a)

90cm

b)

1m

c)

10cm

d)

1.1cm

4.

Two trains running in opposite directions cross a man standing on the

platform in 27 seconds and 17 seconds respectively. If they cross each other

in 23 seconds, what is the ratio of their speeds?

a)

Insufficient data

b)

3:1

c)

1:3

d)

3:2

5.

Find the derivative of the function f(x) = (2x^2 + 3x + 1)(4x^3 - 2x + 5).

a)

40x^4 + 68x^3 + 72x^2 - 8x + 46

b)

40x^4 + 68x^3 + 72x - 8x^(1/2) + 36

c)

40x^4 + 68x^3 + 72x^2 - 8x

d)

40x^4 + 68x^3 + 72x^2 - 46

6.

A car travels a distance of 240 kilometers in 4 hours. What is the

average speed of the car?

a)

60 km/h

b)

80 km/h

c)

120 km/h

d)

240 km/h

7.

A train travels a distance of 540 kilometers at an average speed

of 90 km/h. If the train stops for 15 minutes during the journey, what is the

total time taken by the train to complete the trip?

a)

6 hours

b)

6.5 hours

c)

7 hours

d)

7.5 hours

8.

Find the derivative of the function f(x) = 5x^3 - 2x^2 + 4x - 3.

a)

f'(x) = 15x^2 - 4x + 4

b)

f'(x) = 15x^2 - 4x - 4

c)

f'(x) = 15x^2 - 2x + 4

d)

f'(x) = 15x^2 - 2x - 4

9.

A car travels a distance of 300 kilometers at an average speed of

60 km/h. How long does it take for the car to complete the journey?

a)

2 hours

b)

3 hours

c)

4 hours

d)

5 hours

10.

A bag contains 5 red balls and 7 blue balls. If two balls are

drawn randomly without replacement, what is the probability that both balls

are red?

a)

5/66

b)

5/33

c)

5/12

d)

4/11

11.

Find the derivative of the function f(x) = sin(3x) + cos(2x)

a)

f'(x) = 3cos(3x) - 2sin(2x)

b)

f'(x) = 3cos(3x) + 2sin(2x)

c)

f'(x) = 3sin(3x) - 2cos(2x)

d)

f'(x) = 3sin(3x) + 2cos(2x)

12.

Find the greatest number that will divide 43, 91 and 183 so as to leave the same

remainder in each case.

a)

4

b)

7

c)

9

d)

13

13.

The greatest number of four digits which is divisible by 15, 25, 40 and 75 is:

a)

9000

b)

9400

c)

9600

d)

9800

14.

In a deck of playing cards, what is the probability of drawing a

red card or a face card (jack, queen, or king)?

a)

12/13

b)

10/13

c)

11/13

d)

8/13

15.

In a certain store, the profit is 320% of the cost. If the cost increases by

25% but the selling price remains constant, approximately what percentage of

the selling price is the profit?

a)

30%

b)

70%

c)

100%

d)

250%