I am an odd number. Take away a letter and I become even. What number am I?

What does this rebus mean?

O
N
C
E
TIME

There is a square piece of paper with a hole that is denoted by the circle on the top right side in the given picture. You have to cut the paper in a manner that it forms two and only two separate pieces of paper and then rearrange the pieces in a manner that the holes come in the centre of the paper.

Find the next number in the sequence

1, 2, 6, 21, 88, __?

What's a single-digit number with no value?

What is the probability of choosing the correct answer at random from the options below?

a) 1/4
b) 1/2
c) 1
d) 1/4

Can you find any error in the following sentence?

A taxi was standing outside a fort at night. A man came out of the fort, opened the gate and hit the taxi driver killing him instantly. He took all the money out of the meter and started running till he was caught by a local sheriff.

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

Arrange the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 above and below the division line in a manner that the thus formed fractions equal to 1/3.

(You can use one number only once)