List of top General Knowledge and Mental Ability Questions on mathematical reasoning

In a group of 100 people, 30 speak only English, another 50 speak only Telugu, and another 20 speak both. How many speak at least one language?
Find the missing number in this series: 7, 14, 42, ........., 840.
Identify the next in the series: AZ, BY, CX, ?
A man walks 8 km north, then 8 km east, and 2 km south. What is his final distance from the starting point?
If January 10th was a Saturday, what day is February 14th in the same year?
Pointing to a woman, Mahesh said, “She is the daughter-in-law of my paternal grandmother’s only child.” How is the woman related to Mahesh?
The famous rock-cut temples of Ellora are located in which State?
If 8 + 12 = 4, 6 + 9 = 3, then 10 + 15 = ?
In a certain language, "MONDAY" is written as "NPOEBZ". How is "FRIDAY" written in that language?
If 2 + 3 = 10 and 7 + 2 = 63, what is 6 + 5?
If CAT = 3120, then DOG = ?
Which is the odd number in the series: 2, 4, 8, 10, 16?
If a clock shows 2:00 o' clock, what is the angle between the hands?
What will be the next letter in the series? Z, X, V, T, ______
If today is Monday, what will be the day after 100 days?