Basic Maths
How many months have 28 days?
All of them—some just have more!
If 12 oranges cost ₹180, how much will 5 oranges cost?
Cost of 1 orange = 180 ÷ 12 = ₹15
Cost of 5 oranges = 15 × 5 = ₹75
If the ratio of boys to girls in a class is 3:2 and there are 9 boys, how many girls are there?
6
Add the fractions: 3/6 + 2/5 = ?
27/30 (9/10)
Find the successor and predecessor of 9,999
Successor = 10,000
Predecessor = 9,998
Solve for x in the equation: 3x + 5 = 20
5
The cost of 12 kg of rice is ₹480. Find how much rice can be bought for ₹200
5 kg
Divide ₹240 in the ratio 2:3:5 among three children. How much does each child get?
₹48, ₹72, ₹120
Subtract 2/5 from 3/4
7/20
Arrange the following in ascending order:
0.6, 0.56, 0.65, 0.506
0.506 < 0.56 < 0.6 < 0.65
what is 25% of 80
20
A machine can print 240 pages in 6 hours. How many pages can it print in 2 hours, assuming it works at a constant rate?
The unitary method involves finding the value for one unit first and then scaling it up or down. Here, pages printed in 6 hours = 240. Pages printed in 1 hour = 240 ÷ 6 = 40 pages. Therefore, pages printed in 2 hours = 40 × 2 = 80 pages.
The ratio of the ages of two brothers is 3:5. If the younger brother is 9 years old, find the age of the older brother and check if they are in proportion with another pair 6:10.
15 years , Yes, 3:5
Which is greater: 5/6 or 4/5?
5/6
A ribbon is 4.5 meters long. If it is cut into pieces of 0.75 meters each, how many pieces can be made?
6
At 5 a.m., the temperature was −6°C.
By 10 a.m., it rose by 9°C.
In the afternoon, it fell by twice the rise that occurred in the morning.
At night, it rose again by 4°C
Find the temperature at night
−11°C
18 painters paint 54 rooms in 9 days. How many rooms will 24 painters paint in 9 days?
72 rooms
In a factory, the ratio of workers to supervisors is 7:2. If there are 144 workers and supervisors in total, how many supervisors are there?
32 supervisors
Add 1/3 to the product of 2/5 and 3/4 and then subtract the result from 5/6
1/5
5/6−[1/3+(2/5×3/4)]
How many 3-digit numbers are there?
Smallest 3-digit number = 100
Largest 3-digit number = 999
Total = 999 − 100 + 1 = 900 numbers
I am an odd number. Take away a letter, and I become even. What number am I?
Seven (remove the 's' to get "even")
If 3 machines produce 90 items in 6 hours, how many items will 1 machine produce in 1 hour?
Items produced per hour by 3 machines = 90 ÷ 6 = 15
Items produced per hour by 1 machine = 15 ÷ 3 = 5 items
In a school, the ratio of students to teachers is 45:3. If there are 360 students in the school, how many teachers are there? The school decides to maintain a new ratio of 30:2 (students to teachers). How many additional teachers should be hired?
24 , no addition
Meera walked 3/4 km in the morning and 2/3 of that distance in the evening.
What total distance did she walk in a day?
1.25 km
Find the smallest number which when divided by 6, 8, and 12 leaves remainder 5
LCM of (6, 8, 12) = 24
Required number = 24 + 5 = 29