Free Printable Mental Math

1.

Simplify the following: $6\ +\frac{3}{10}\ +\ \frac{4}{25}$

a)

6.46

b)

6.34

c)

6.44

2.

Fahad has 60 cows. He sells 75% of them. How many does he still have?

a)

30

b)

45

c)

15

3.

Simplify the following: $\frac{13}{100}\ +\ \frac{13}{1000}\ +\ 1.3$

a)

14.43

b)

1.443

c)

0.1443

4.

Which one of the following is false?

a)

The sum of two even numbers is even

b)

The product of two odd numbers is odd

c)

The difference of two even numbers is even

d)

The sum of two odd numbers is odd

e)

None of these

5.

Amina had to walk 2 kilometres to school. After she had walked 280 metres, she stopped for a rest. What fraction of the distance had she walked?

a)

$\frac{14}{10}$

b)

$\frac{14}{100}$

c)

$\frac{14}{1000}$

6.

Sadiya has 500 Naira. She spends 64% of it. How much does she spend?

a)

320 Naira

b)

280 Naira

c)

180 Naira

d)

300 Naira

7.

Decrease 150 in the ratio 5:6

a)

250

b)

150

c)

125

d)

25

8.

Find the value of x if 3 : 5 = 15 : x

a)

15

b)

25

c)

5

d)

3

9.

Find the value of M.
$M^2\ +\ 64\ =\ 185$

a)

17

b)

15

c)

11

d)

121

10.

What fraction of a day is 6 hours 45 minutes?

a)

$\frac{9}{8}$

b)

$\frac{9}{32}$

c)

$\frac{9}{16}$

d)

$\frac{2}{9}$

11.

A contractor employed 80 men to do a certain job in 20 days. How many labourers working at the same rate could complete the work in 4 days?

a)

16 men

b)

1600 men

c)

400 men

d)

225 men

12.

121 = 7 + 37x + 3 then find x.

a)

7

b)

4

c)

2

d)

3

13.

At what speed does a man walk if he covers 18 km in 6 hours?

a)

108 km/h

b)

12 km/h

c)

6 km/h

d)

3 km/h

14.

The average weight of 7 pupils in a class is 15 kg. If the total weight of 4 of them is 75 kg, what is the average weight of the remaining three?

a)

8 kg

b)

15 kg

c)

10 kg

d)

12 kg

15.

Toni has 45.5 kg. Chika has 5.5 kg more than Toni. Find their total weight.

a)

90 kg

b)

96.5 kg

c)

65.6 kg

d)

76.5 kg

Mental Math

Total questions: 15

Worksheet time: 33mins

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