If y + 16 = 24 then y = _______?
a) 8
b) -8
c) 40
d) -40
Explanation: y + 16 = 24
y = 24 – 16 y = 8
A man earns Rs. 1400 a week, find his per day income.
a) Rs. 490
b) Rs. 200
c) Rs. 70
d) Rs. 7
A man earns Rs. 1400 a week, find his per day income.
a) Rs. 490
b) Rs. 200
c) Rs. 70
d) Rs. 7
Explanation: 1400/7 = 200
Explanation:
To subtract fractions, we need to have a common
denominator. In this case, the common denominator is 10.
9/10 - 4/10 = (9 - 4)/10 = 5/10
However, 5/10 can be simplified further by dividing both the numerator and the
denominator by their greatest common divisor, which is 5.
5/10 = 1/2
The
average age of 24 boys and the teacher is 15 years. When the teacher’s age is
excluded the average decreases by 1.
What is the age of the teacher?
a) 38 years
b) 39 years
c) 40 years
d) Data inadequate
Explanation: Given that , The average age of 24 boys and their teacher = 15 years.
Total age of 24 boys and teacher
= (24 + 1) × 15 = 25 x 15 = 375
When the teacher’s age is excluded, Total decrease age = 24 × (15 – 1)
= 24 × 14 = 336
The age of the teacher =375 – 336
= 39 years
Junaid is now three years older than Baber. If seven years from now the sum of their ages is 79, how old is Baber now?
a) 37 years
b) 34 years
c) 32 years
d) 31 years
Explanation: Suppose
Baber age = x,
then Junain age will be = x + 3
After 7 years : Baber age = x + 7 and Junaid = x + 3 + 7 = x + 10
According to condition
x + 7 + x + 10 = 79
2x + 17 = 79
2x = 79 – 17 2x = 62 x = 31
Therefore at this time the age of Baber is 31 years.
