A grocer sells an article for £54 at a profit of 8%.
What is her percentage profit or loss if she sells the same article for £44?

In a Year 12 class of 45 students, every student has to offer either Chemistry or Economics or both.
If 25 students offer Chemistry while 34 offer Economics,
how many students offer both subjects?

The value of (111₂)²,
expressed in base 2 is

If 641_x + 156_x = 807x,
the number base x is

If 14_twelve = y_eight,
the value of y is

The number 110101₂ converted to base ten equals to

A school went into a sports fiesta with a contingent which includes 11 footballers and 8 sprinters.
If 3 of the footballers are also sprinters, how many of the students are either footballers or sprinters

Solve for x
if
(5x)₇ = 37₁₀

Solve for y in the following equation given in base two:
 
 11(y + 101) = 1000y

If I is the set of positive integers and
P = {x : x ∈ I, x² < 10 and x ≠ 0}, then

A sum of money invested at 6% per annum simple interest increased to £14,750 after 3 years.
The sum was?

The universal set U contains all integers.
Subsets of U are defined as
P = {x : x ≤ 3}
Q = {x : -5 < x < 12}
R = {x : -2 ≤ x < 5}
Q ∪ R = ?

Ebuka sold a radio set to Jenny at a profit of 10% and Jenny sold it for $2612.50 at a loss of 5%.
The cost of the radio to Ebuka was

A worker is allowed 10% of her income tax free and pays 15% on the remainder.
If her tax amounts to $2,970, her income is

A trader sold an article for N 660.00 at a profit of 20%.
In order to make a profit of 30%,
the article should have been sold for

Convert 69₁₀ to a number in base two

Solve for x
if
404_five = 150_x

If 45% of the Nigerian naira (N) is equal to 35% of a foreign currency $,
the conversion rate of $ to N is $1 =

The ratio of the age of a father to that of his son is 9 : 2.
If the son is now 8 years old,
the ratio of their ages in 4 years time will be

If E = {k, m, n, p, r},
X = {k, m, n, r}, and
Y = {k, n, p},

find X' ∩ Y'

How long will it take for a sum of money invested at 8% simple interest to double the original sum?

The sum of prime numbers between 1 and 15 is

In a class of 58 students, 35 offer Biology, 28 offer Economics and 15 offer Physics.
Each student offers at least one of the three subjects.
If 12 students offer both Biology and Economics, 7 students offer both Biology and Physics and 5 students offer both Economics and Physics,
how many students offer all three subjects?

A man bought a wrist watch for $750.00 and re-sold it for $600.00.
His percentage loss was?

Given that P = {1, 3, 4} and
Q = {2, 3, 4},
then P∩Q is